TexasET Network

Nasho's 170 Day Weather Summary
Date	ETo (mm)	Max Temp (c)	Min Temp (c)	Min RH (%)	Solar Rad. (MJ/m2)	Rainfall (mm)	Wind 4am (m/s)	Wind 4pm (m/s)	Battery (v)
Oct 11, 2024 - Fri	1.86	22	18	63	7.19	3.81	0.00	0.42
Oct 10, 2024 - Thu	2.19	25	17	52	8.85	3.30	1.80	1.72
Oct 09, 2024 - Wed	2.59	24	18	49	11.71	1.27	0.00	1.30
Oct 08, 2024 - Tue	1.89	22	19	60	7.24	3.56	0.90	0.84
Oct 07, 2024 - Mon	3.02	28	19	35	13.06	4.83	0.47	2.49
Oct 06, 2024 - Sun	4.09	27	19	33	11.31	0.00	0.72	3.72
Oct 05, 2024 - Sat	4.11	28	19	30	15.31	0.00	3.57	1.93
Oct 04, 2024 - Fri	7.89	30	20	22	23.60	0.00	4.97	4.23
Oct 03, 2024 - Thu	4.98	28	20	30	14.78	0.00	0.00	5.06
Oct 02, 2024 - Wed	4.00	28	18	34	16.18	0.00	0.00	2.22
Oct 01, 2024 - Tue	4.41	29	18	37	20.05	0.00	0.00	5.83
Sep 30, 2024 - Mon	2.34	25	19	47	9.40	0.51	1.57	0.23
Sep 29, 2024 - Sun	3.75	28	18	34	14.02	0.00	1.05	8.62
Sep 28, 2024 - Sat	4.64	30	19	29	19.09	0.00	0.00	4.05
Sep 27, 2024 - Fri	5.46	32	18	20	24.27	0.00	0.00	2.35
Sep 26, 2024 - Thu	4.72	31	17	23	19.18	0.00	0.18	7.01
Sep 25, 2024 - Wed	3.85	28	19	29	13.43	0.00	0.00	3.62
Sep 24, 2024 - Tue	5.96	30	20	20	22.29	0.00	1.73	2.71
Sep 23, 2024 - Mon	5.47	29	19	22	21.18	0.00	0.37	3.61
Sep 22, 2024 - Sun	3.66	27	20	42	14.36	0.00	3.04	3.17
Sep 21, 2024 - Sat	3.85	28	20	36	18.79	0.00	1.37	5.02
Sep 20, 2024 - Fri	2.78	27	19	39	11.64	13.21	0.02	0.09
Sep 19, 2024 - Thu	5.00	31	18	26	21.52	0.25	0.00	2.30
Sep 18, 2024 - Wed	5.20	31	18	26	23.02	0.00	0.27	4.58
Sep 17, 2024 - Tue	3.80	27	19	35	14.42	0.00	1.20	2.92
Sep 16, 2024 - Mon	5.37	32	17	17	23.19	0.00	0.00	2.53
Sep 15, 2024 - Sun	6.07	31	16	15	24.06	0.00	0.17	3.36
Sep 14, 2024 - Sat	6.76	31	16	13	23.92	0.00	0.30	4.26
Sep 13, 2024 - Fri	6.24	31	20	17	22.73	0.00	0.55	4.10
Sep 12, 2024 - Thu	6.02	31	17	19	24.35	0.00	0.04	3.75
Sep 11, 2024 - Wed	3.51	28	17	33	16.59	0.00	0.00	0.24
Sep 10, 2024 - Tue	3.99	30	18	29	19.55	0.00	0.00	5.22
Sep 09, 2024 - Mon	5.13	31	18	27	23.17	0.00	0.00	5.37
Sep 08, 2024 - Sun	4.36	29	18	29	18.52	0.00	0.04	7.96
Sep 07, 2024 - Sat	2.61	25	18	48	11.17	4.83	0.00	2.89
Sep 06, 2024 - Fri	4.06	27	18	35	17.30	0.00	0.00	5.60
Sep 05, 2024 - Thu	3.81	27	17	36	16.02	0.00	0.03	5.17
Sep 04, 2024 - Wed	3.25	26	18	33	10.93	0.00	0.18	1.13
Sep 03, 2024 - Tue	3.88	28	16	28	14.25	0.00	0.00	4.49
Sep 02, 2024 - Mon	4.93	28	21	26	15.57	0.00	1.42	2.76
Sep 01, 2024 - Sun	3.52	27	18	29	11.56	0.00	0.33	3.20
Aug 31, 2024 - Sat	5.09	29	18	27	20.71	0.00	0.02	3.33
Aug 30, 2024 - Fri	3.97	28	19	36	16.06	0.76	1.70	1.42
Aug 29, 2024 - Thu	3.41	28	20	38	15.95	0.00	0.18	1.53
Aug 28, 2024 - Wed	3.94	31	21	28	18.41	0.00	0.00	2.65
Aug 27, 2024 - Tue	4.54	28	19	34	19.84	0.00	0.00	5.91
Aug 26, 2024 - Mon	5.22	28	21	28	18.98	0.00	1.23	2.61
Aug 25, 2024 - Sun	6.28	28	22	24	19.52	0.00	2.01	2.95
Aug 24, 2024 - Sat	4.55	28	20	27	18.59	0.00	0.39	2.74
Aug 23, 2024 - Fri	4.70	29	17	22	20.50	0.00	0.00	4.23
Aug 22, 2024 - Thu	3.11	27	20	26	12.99	0.00	0.00	0.83
Aug 21, 2024 - Wed	4.60	29	21	21	17.35	0.00	0.34	2.78
Aug 20, 2024 - Tue	4.76	28	19	22	20.63	0.00	0.15	2.34
Aug 19, 2024 - Mon	5.82	29	20	20	22.58	0.00	0.61	3.05
Aug 18, 2024 - Sun	5.20	28	18	26	20.75	0.00	0.00	4.31
Aug 17, 2024 - Sat	4.58	28	17	26	21.84	0.00	0.04	3.10
Aug 16, 2024 - Fri	2.16	24	18	55	9.11	11.43	0.00	3.36
Aug 15, 2024 - Thu	4.05	29	18	28	16.44	0.00	0.00	3.89
Aug 14, 2024 - Wed	4.90	30	19	30	22.36	1.52	0.00	2.42
Aug 13, 2024 - Tue	4.78	30	17	22	21.23	0.00	0.00	3.71
Aug 12, 2024 - Mon	4.92	31	18	20	21.52	0.00	0.00	2.52
Aug 11, 2024 - Sun	4.79	30	16	27	22.09	0.00	0.00	1.20
Aug 10, 2024 - Sat	3.10	26	18	45	11.49	0.25	0.02	3.45
Aug 09, 2024 - Fri	4.31	29	18	28	17.92	0.00	0.15	4.32
Aug 08, 2024 - Thu	5.10	30	20	22	22.95	0.00	0.00	1.91
Aug 07, 2024 - Wed	4.98	31	15	15	22.17	0.00	0.00	3.19
Aug 06, 2024 - Tue	4.03	31	15	12	21.69	0.00	0.00	1.85
Aug 05, 2024 - Mon	5.07	31	18	11	21.99	0.00	0.79	1.60
Aug 04, 2024 - Sun	6.67	30	21	19	22.64	0.00	3.22	3.74
Aug 03, 2024 - Sat	5.45	30	18	21	21.72	0.00	0.12	2.46
Aug 02, 2024 - Fri	4.69	29	15	22	22.21	0.00	0.03	2.25
Aug 01, 2024 - Thu	3.65	27	17	35	15.34	0.00	0.00	6.85
Jul 31, 2024 - Wed	3.45	27	19	36	13.14	0.00	0.00	3.40
Jul 30, 2024 - Tue	3.11	29	20	25	13.32	0.00	0.00	3.27
Jul 29, 2024 - Mon	4.11	29	17	27	17.07	0.00	0.00	3.55
Jul 28, 2024 - Sun	3.66	30	16	15	17.91	0.00	0.22	2.98
Jul 27, 2024 - Sat	4.51	30	17	14	17.89	0.00	0.00	4.73
Jul 26, 2024 - Fri	3.83	30	16	17	19.81	0.00	0.00	2.01
Jul 25, 2024 - Thu	4.00	30	15	18	22.09	0.00	1.24	2.75
Jul 24, 2024 - Wed	4.63	29	16	16	21.00	0.00	0.00	2.59
Jul 23, 2024 - Tue	4.28	29	16	23	19.09	0.00	0.00	2.38
Jul 22, 2024 - Mon	2.27	27	19	37	7.90	0.00	0.00	2.55
Jul 21, 2024 - Sun	3.30	30	18	28	15.13	0.00	0.00	2.01
Jul 20, 2024 - Sat	3.27	28	19	28	15.51	18.03	0.00	2.68
Jul 19, 2024 - Fri	2.82	26	18	32	12.08	0.00	0.00	0.00
Jul 18, 2024 - Thu	4.28	29	16	22	18.35	0.00	0.00	2.02
Jul 17, 2024 - Wed	3.61	30	18	24	17.92	0.00	0.60	1.86
Jul 16, 2024 - Tue	3.75	29	16	25	19.98	0.00	0.00	2.17
Jul 15, 2024 - Mon	3.93	29	17	22	21.49	0.00	0.44	2.58
Jul 14, 2024 - Sun	4.79	30	18	23	22.58	0.00	0.00	1.68
Jul 13, 2024 - Sat	4.51	29	17	23	20.15	0.00	0.00	2.27
Jul 02, 2024 - Tue	4.65	29	17	17	21.85	0.00	0.47	2.71
Jul 01, 2024 - Mon	6.14	29	18	20	22.26	0.00	2.32	3.12
Jun 30, 2024 - Sun	6.21	29	19	18	22.92	0.00	0.00	3.59
Jun 29, 2024 - Sat	4.68	28	19	26	22.07	0.00	0.05	2.62
Jun 28, 2024 - Fri	5.68	27	20	27	19.84	0.00	3.78	3.75
Jun 27, 2024 - Thu	6.49	27	19	26	22.56	0.00	3.25	3.88
Jun 26, 2024 - Wed	6.65	28	18	24	22.95	0.00	4.98	2.75
Jun 25, 2024 - Tue	7.17	27	19	21	23.26	0.00	4.96	2.86
Jun 24, 2024 - Mon	5.93	28	20	26	22.52	0.00	0.42	3.70
Jun 23, 2024 - Sun	5.64	28	20	29	19.60	0.00	1.11	3.29
Jun 22, 2024 - Sat	5.48	27	19	29	19.97	30.23	2.39	1.70
Jun 21, 2024 - Fri	5.55	28	20	31	20.16	0.00	4.19	4.48
Jun 20, 2024 - Thu	4.51	28	17	30	17.20	0.00	0.00	4.60
Jun 19, 2024 - Wed	4.70	30	17	24	22.37	0.00	0.22	1.85
Jun 18, 2024 - Tue	4.61	29	16	22	22.07	0.00	0.00	2.02
Jun 17, 2024 - Mon	4.27	28	20	29	18.11	0.00	0.27	3.57
Jun 16, 2024 - Sun	4.37	28	19	29	19.46	0.00	0.24	2.16
Jun 15, 2024 - Sat	4.57	29	18	27	21.72	0.00	0.20	1.80
Jun 14, 2024 - Fri	4.47	29	18	28	20.59	0.00	0.86	2.56
Jun 13, 2024 - Thu	4.44	29	17	30	21.54	0.00	0.03	2.43
Jun 12, 2024 - Wed	4.13	27	19	33	18.37	0.00	0.09	2.82
Jun 11, 2024 - Tue	6.35	28	19	0	20.49	0.00	0.25	3.46
Jun 10, 2024 - Mon	5.08	28	20	29	19.29	0.00	0.00	2.77
Jun 09, 2024 - Sun	4.71	27	20	30	16.91	0.00	0.40	4.76
Jun 08, 2024 - Sat	4.78	30	18	25	16.76	0.00	0.47	3.13
Jun 07, 2024 - Fri	4.45	30	20	26	18.62	0.00	0.69	3.16
Jun 06, 2024 - Thu	5.69	29	20	26	18.76	0.00	0.51	2.96
Jun 05, 2024 - Wed	4.97	30	20	28	18.82	0.00	0.18	2.32
Jun 04, 2024 - Tue	4.11	30	19	31	17.36	0.00	0.09	3.67
Jun 03, 2024 - Mon	3.89	31	18	29	20.12	0.00	0.00	2.66
Jun 02, 2024 - Sun	4.37	30	20	31	19.13	0.00	0.15	1.85
Jun 01, 2024 - Sat	3.86	31	19	31	14.73	0.00	0.00	1.71
May 31, 2024 - Fri	3.77	30	19	28	19.01	0.00	1.02	2.64
May 30, 2024 - Thu	2.88	30	18	32	17.33	0.00	0.15	0.38
May 29, 2024 - Wed	4.29	30	20	33	18.94	0.00	0.78	1.74
May 28, 2024 - Tue	4.08	29	21	35	12.36	0.00	0.63	3.12
May 27, 2024 - Mon	3.58	30	18	32	18.05	0.00	0.39	2.69
May 26, 2024 - Sun	4.22	29	21	30	16.65	0.00	0.09	3.15
May 25, 2024 - Sat	3.96	28	18	30	16.98	0.00	0.23	1.59
May 24, 2024 - Fri	4.47	29	19	31	20.63	0.00	0.54	2.89
May 23, 2024 - Thu	4.20	29	20	30	17.35	0.00	0.05	3.78
May 22, 2024 - Wed	4.69	28	21	37	17.02	0.00	0.79	2.37
May 21, 2024 - Tue	3.93	28	21	37	15.41	0.00	0.31	2.97
May 20, 2024 - Mon	3.58	28	18	40	18.38	0.00	0.63	1.63
May 19, 2024 - Sun	3.45	30	19	36	16.43	0.00	0.00	0.94
May 18, 2024 - Sat	4.16	29	20	37	18.32	0.00	0.48	3.20
May 17, 2024 - Fri	4.59	30	18	34	22.02	0.00	0.01	3.24
May 16, 2024 - Thu	3.46	29	20	37	16.73	0.00	0.00	2.02
May 15, 2024 - Wed	4.05	28	20	38	16.95	0.00	0.72	3.63
May 14, 2024 - Tue	4.99	28	20	35	20.57	0.00	1.68	2.51
May 13, 2024 - Mon	3.01	28	19	40	14.02	0.00	0.15	1.91
May 12, 2024 - Sun	3.93	30	19	37	20.32	0.00	0.38	1.87
May 11, 2024 - Sat	3.19	29	20	41	15.10	6.10	0.21	2.05
May 10, 2024 - Fri	3.40	26	21	47	13.35	0.00	1.70	2.25
May 09, 2024 - Thu	3.10	25	20	52	12.33	0.00	2.83	2.02
May 08, 2024 - Wed	2.41	28	20	46	9.74	2.03	0.90	0.80
May 07, 2024 - Tue	3.82	29	19	37	16.13	0.76	0.89	2.67
May 06, 2024 - Mon	3.78	28	20	41	15.57	0.00	0.61	2.59
May 05, 2024 - Sun	4.19	29	18	38	19.40	0.76	0.00	1.69
May 04, 2024 - Sat	3.00	26	20	43	11.46	0.00	1.03	2.58
May 03, 2024 - Fri	3.30	28	19	46	16.45	0.00	0.03	1.71
May 02, 2024 - Thu	2.16	26	20	55	8.96	15.75	0.32	4.72
May 01, 2024 - Wed	3.20	28	20	41	14.96	0.00	0.67	1.89
Apr 30, 2024 - Tue	3.53	27	20	44	14.84	0.76	0.86	2.19
Apr 29, 2024 - Mon	3.31	28	19	45	16.19	0.00	0.80	1.93
Apr 28, 2024 - Sun	3.36	25	18	53	15.76	4.06	1.74	3.62
Apr 27, 2024 - Sat	4.06	28	19	43	18.89	0.00	0.27	1.43
Apr 26, 2024 - Fri	2.28	24	19	58	10.03	0.00	0.42	1.44
Apr 25, 2024 - Thu	2.15	24	20	56	9.02	10.92	0.20	1.13
Apr 24, 2024 - Wed	3.04	26	19	53	15.21	2.54	0.00	1.81
Apr 23, 2024 - Tue	2.20	24	19	64	9.98	24.64	0.67	0.02
Apr 22, 2024 - Mon	3.72	29	19	40	18.54	1.27	1.58	1.15
Apr 21, 2024 - Sun	4.19	28	19	41	16.67	6.60	0.54	3.83
Apr 20, 2024 - Sat	3.78	28	22	44	14.82	0.00	1.03	3.00
Apr 19, 2024 - Fri	4.24	28	18	40	20.10	0.00	0.55	3.24
Apr 17, 2024 - Wed	4.31	27	20	45	18.52	0.00	0.27	3.44
Apr 16, 2024 - Tue	3.55	28	20	46	17.83	6.35	0.84	0.72
Apr 15, 2024 - Mon	3.86	28	19	43	17.33	1.78	0.13	1.83
Apr 14, 2024 - Sun	1.75	23	19	62	6.81	14.98	0.16	0.94
Data Summary	720.33	32	15	31	3,008.63	197.11	0.59	2.83

Detailed Crop Weather Data
Date	Average Temp (c)	Dew Point (c)	Max Dewpoint (c)	Min Dewpoint (c)	Wind Run (km/day)	Soil Temp (c)
Oct 11, 2024 - Fri	20	15	16	13	51	0
Oct 10, 2024 - Thu	20	14	16	13	47	0
Oct 09, 2024 - Wed	20	14	16	12	54	0
Oct 08, 2024 - Tue	20	15	16	13	47	0
Oct 07, 2024 - Mon	21	14	16	13	72	0
Oct 06, 2024 - Sun	23	13	14	11	138	0
Oct 05, 2024 - Sat	23	12	14	8	107	0
Oct 04, 2024 - Fri	25	11	14	9	233	0
Oct 03, 2024 - Thu	23	12	16	10	183	0
Oct 02, 2024 - Wed	22	15	17	13	87	0
Oct 01, 2024 - Tue	22	15	16	12	100	0
Sep 30, 2024 - Mon	21	15	16	12	39	0
Sep 29, 2024 - Sun	22	14	15	11	106	0
Sep 28, 2024 - Sat	24	14	16	12	112	0
Sep 27, 2024 - Fri	24	15	16	13	82	0
Sep 26, 2024 - Thu	22	14	16	11	93	0
Sep 25, 2024 - Wed	22	13	14	11	92	0
Sep 24, 2024 - Tue	24	11	14	7	121	0
Sep 23, 2024 - Mon	24	13	14	10	149	0
Sep 22, 2024 - Sun	22	14	15	13	99	0
Sep 21, 2024 - Sat	23	15	16	13	77	0
Sep 20, 2024 - Fri	21	14	17	12	44	0
Sep 19, 2024 - Thu	23	14	16	11	100	0
Sep 18, 2024 - Wed	24	14	16	12	88	0
Sep 17, 2024 - Tue	23	14	15	12	100	0
Sep 16, 2024 - Mon	24	11	15	6	86	0
Sep 15, 2024 - Sun	23	10	14	6	117	0
Sep 14, 2024 - Sat	24	11	14	7	172	0
Sep 13, 2024 - Fri	25	11	14	7	151	0
Sep 12, 2024 - Thu	24	12	14	6	132	0
Sep 11, 2024 - Wed	22	13	15	11	68	0
Sep 10, 2024 - Tue	23	13	16	11	72	0
Sep 09, 2024 - Mon	23	13	16	11	94	0
Sep 08, 2024 - Sun	22	14	15	11	100	0
Sep 07, 2024 - Sat	21	14	15	11	49	0
Sep 06, 2024 - Fri	22	14	15	13	102	0
Sep 05, 2024 - Thu	22	13	15	12	109	0
Sep 04, 2024 - Wed	22	13	14	9	88	0
Sep 03, 2024 - Tue	22	12	15	9	82	0
Sep 02, 2024 - Mon	24	11	13	10	114	0
Sep 01, 2024 - Sun	23	11	13	9	98	0
Aug 31, 2024 - Sat	22	13	15	10	117	0
Aug 30, 2024 - Fri	23	14	15	12	102	0
Aug 29, 2024 - Thu	23	14	16	11	60	0
Aug 28, 2024 - Wed	25	14	16	12	65	0
Aug 27, 2024 - Tue	23	13	15	11	106	0
Aug 26, 2024 - Mon	24	12	14	9	127	0
Aug 25, 2024 - Sun	24	11	13	9	154	0
Aug 24, 2024 - Sat	24	11	13	9	101	0
Aug 23, 2024 - Fri	23	11	14	9	97	0
Aug 22, 2024 - Thu	23	11	12	10	71	0
Aug 21, 2024 - Wed	24	10	13	7	90	0
Aug 20, 2024 - Tue	23	10	13	7	101	0
Aug 19, 2024 - Mon	24	11	13	8	135	0
Aug 18, 2024 - Sun	23	11	13	9	125	0
Aug 17, 2024 - Sat	22	13	16	9	107	0
Aug 16, 2024 - Fri	20	15	16	13	56	0
Aug 15, 2024 - Thu	23	15	15	13	91	0
Aug 14, 2024 - Wed	24	15	16	14	89	0
Aug 13, 2024 - Tue	23	14	15	13	86	0
Aug 12, 2024 - Mon	24	14	15	12	81	0
Aug 11, 2024 - Sun	23	14	16	12	75	0
Aug 10, 2024 - Sat	21	14	15	12	78	0
Aug 09, 2024 - Fri	23	13	15	11	86	0
Aug 08, 2024 - Thu	25	11	14	8	88	0
Aug 07, 2024 - Wed	23	11	14	7	94	0
Aug 06, 2024 - Tue	22	9	13	3	56	0
Aug 05, 2024 - Mon	25	9	13	6	87	0
Aug 04, 2024 - Sun	25	11	14	9	166	0
Aug 03, 2024 - Sat	24	11	14	7	123	0
Aug 02, 2024 - Fri	22	11	13	7	74	0
Aug 01, 2024 - Thu	21	13	15	11	102	0
Jul 31, 2024 - Wed	23	14	16	13	82	0
Jul 30, 2024 - Tue	23	14	15	13	60	0
Jul 29, 2024 - Mon	22	13	15	11	84	0
Jul 28, 2024 - Sun	23	10	13	6	68	0
Jul 27, 2024 - Sat	23	10	13	7	106	0
Jul 26, 2024 - Fri	23	10	14	7	58	0
Jul 25, 2024 - Thu	22	10	14	6	67	0
Jul 24, 2024 - Wed	22	10	13	7	75	0
Jul 23, 2024 - Tue	22	13	15	12	80	0
Jul 22, 2024 - Mon	22	14	16	13	65	0
Jul 21, 2024 - Sun	23	13	15	11	57	0
Jul 20, 2024 - Sat	23	13	14	11	73	0
Jul 19, 2024 - Fri	22	11	14	9	50	0
Jul 18, 2024 - Thu	23	12	14	11	89	0
Jul 17, 2024 - Wed	23	12	15	9	72	0
Jul 16, 2024 - Tue	23	11	14	8	57	0
Jul 15, 2024 - Mon	23	11	14	8	73	0
Jul 14, 2024 - Sun	24	12	15	10	97	0
Jul 13, 2024 - Sat	23	12	14	9	101	0
Jul 02, 2024 - Tue	23	10	13	8	92	0
Jul 01, 2024 - Mon	24	11	13	8	165	0
Jun 30, 2024 - Sun	23	11	13	8	161	0
Jun 29, 2024 - Sat	23	11	14	8	94	0
Jun 28, 2024 - Fri	23	11	13	10	154	0
Jun 27, 2024 - Thu	23	10	13	7	220	0
Jun 26, 2024 - Wed	22	9	12	5	218	0
Jun 25, 2024 - Tue	22	9	11	7	247	0
Jun 24, 2024 - Mon	23	11	13	10	169	0
Jun 23, 2024 - Sun	23	12	14	10	173	0
Jun 22, 2024 - Sat	23	11	13	10	157	0
Jun 21, 2024 - Fri	23	13	14	11	181	0
Jun 20, 2024 - Thu	23	13	15	10	116	0
Jun 19, 2024 - Wed	23	12	15	8	85	0
Jun 18, 2024 - Tue	23	12	14	10	94	0
Jun 17, 2024 - Mon	23	12	14	10	92	0
Jun 16, 2024 - Sun	24	12	15	10	99	0
Jun 15, 2024 - Sat	24	13	15	11	80	0
Jun 14, 2024 - Fri	24	13	15	11	85	0
Jun 13, 2024 - Thu	23	13	15	11	100	0
Jun 12, 2024 - Wed	22	12	14	10	101	0
Jun 11, 2024 - Tue	23	11	14	8	167	0
Jun 10, 2024 - Mon	23	11	13	9	139	0
Jun 09, 2024 - Sun	23	11	13	10	141	0
Jun 08, 2024 - Sat	24	13	15	11	129	0
Jun 07, 2024 - Fri	25	13	15	11	110	0
Jun 06, 2024 - Thu	25	13	15	11	152	0
Jun 05, 2024 - Wed	25	14	16	12	113	0
Jun 04, 2024 - Tue	25	15	16	13	110	0
Jun 03, 2024 - Mon	25	15	17	13	60	0
Jun 02, 2024 - Sun	25	15	16	14	77	0
Jun 01, 2024 - Sat	24	15	17	13	76	0
May 31, 2024 - Fri	24	15	16	13	70	0
May 30, 2024 - Thu	24	15	17	12	35	0
May 29, 2024 - Wed	25	15	16	13	82	0
May 28, 2024 - Tue	24	15	16	12	135	0
May 27, 2024 - Mon	23	15	17	13	65	0
May 26, 2024 - Sun	24	14	15	12	79	0
May 25, 2024 - Sat	23	14	15	12	77	0
May 24, 2024 - Fri	23	14	15	12	86	0
May 23, 2024 - Thu	23	14	15	12	104	0
May 22, 2024 - Wed	24	14	16	13	120	0
May 21, 2024 - Tue	24	15	16	13	80	0
May 20, 2024 - Mon	23	15	17	14	55	0
May 19, 2024 - Sun	23	15	17	13	65	0
May 18, 2024 - Sat	24	16	17	13	107	0
May 17, 2024 - Fri	23	16	17	15	84	0
May 16, 2024 - Thu	23	15	17	13	59	0
May 15, 2024 - Wed	24	14	16	12	84	0
May 14, 2024 - Tue	23	14	15	13	115	0
May 13, 2024 - Mon	23	16	17	14	60	0
May 12, 2024 - Sun	23	16	18	15	77	0
May 11, 2024 - Sat	23	17	18	15	57	0
May 10, 2024 - Fri	23	15	17	14	104	0
May 09, 2024 - Thu	22	15	17	13	98	0
May 08, 2024 - Wed	22	17	18	16	73	0
May 07, 2024 - Tue	23	16	17	15	83	0
May 06, 2024 - Mon	23	16	17	14	105	0
May 05, 2024 - Sun	22	16	18	15	81	0
May 04, 2024 - Sat	22	16	19	15	78	0
May 03, 2024 - Fri	22	17	18	15	60	0
May 02, 2024 - Thu	22	17	19	16	70	0
May 01, 2024 - Wed	23	17	19	16	52	0
Apr 30, 2024 - Tue	23	16	17	15	76	0
Apr 29, 2024 - Mon	23	16	18	15	70	0
Apr 28, 2024 - Sun	22	15	17	13	83	0
Apr 27, 2024 - Sat	23	16	17	15	76	0
Apr 26, 2024 - Fri	21	15	18	14	59	0
Apr 25, 2024 - Thu	21	16	19	15	54	0
Apr 24, 2024 - Wed	21	16	18	14	47	0
Apr 23, 2024 - Tue	21	17	19	15	53	0
Apr 22, 2024 - Mon	23	17	19	15	63	0
Apr 21, 2024 - Sun	23	16	19	14	121	0
Apr 20, 2024 - Sat	24	16	17	15	100	0
Apr 19, 2024 - Fri	22	17	18	15	83	0
Apr 17, 2024 - Wed	23	16	18	15	115	0
Apr 16, 2024 - Tue	22	16	18	12	63	0
Apr 15, 2024 - Mon	22	16	19	15	75	0
Apr 14, 2024 - Sun	20	17	18	15	55	0
Data Summary	22	13	19	3	16,308	0

Heat Units
Date	Corn (heat units)	Cotton (heat units)	Sorghum (heat units)	50 Degree (heat units)	55 Degree (heat units)	60 Degree (heat units)
Oct 11, 2024 - Fri	19	9	14	19	14	9
Oct 10, 2024 - Thu	20	10	15	20	15	10
Oct 09, 2024 - Wed	20	10	15	20	15	10
Oct 08, 2024 - Tue	19	9	14	19	14	9
Oct 07, 2024 - Mon	24	14	19	24	19	14
Oct 06, 2024 - Sun	24	14	19	24	19	14
Oct 05, 2024 - Sat	24	14	19	24	19	14
Oct 04, 2024 - Fri	27	18	23	28	23	18
Oct 03, 2024 - Thu	26	16	21	26	21	16
Oct 02, 2024 - Wed	24	14	19	24	19	14
Oct 01, 2024 - Tue	24	14	19	24	19	14
Sep 30, 2024 - Mon	22	12	17	22	17	12
Sep 29, 2024 - Sun	24	14	19	24	19	14
Sep 28, 2024 - Sat	26	17	22	27	22	17
Sep 27, 2024 - Fri	25	17	22	27	22	17
Sep 26, 2024 - Thu	24	15	20	25	20	15
Sep 25, 2024 - Wed	25	15	20	25	20	15
Sep 24, 2024 - Tue	27	17	22	27	22	17
Sep 23, 2024 - Mon	26	16	21	26	21	16
Sep 22, 2024 - Sun	24	14	19	24	19	14
Sep 21, 2024 - Sat	26	16	21	26	21	16
Sep 20, 2024 - Fri	24	14	19	24	19	14
Sep 19, 2024 - Thu	26	17	22	27	22	17
Sep 18, 2024 - Wed	25	17	22	27	22	17
Sep 17, 2024 - Tue	25	15	20	25	20	15
Sep 16, 2024 - Mon	24	16	21	26	21	16
Sep 15, 2024 - Sun	23	14	19	24	19	14
Sep 14, 2024 - Sat	24	15	20	25	20	15
Sep 13, 2024 - Fri	27	18	23	28	23	18
Sep 12, 2024 - Thu	25	16	21	26	21	16
Sep 11, 2024 - Wed	23	13	18	23	18	13
Sep 10, 2024 - Tue	25	15	20	25	20	15
Sep 09, 2024 - Mon	25	16	21	26	21	16
Sep 08, 2024 - Sun	25	15	20	25	20	15
Sep 07, 2024 - Sat	21	11	16	21	16	11
Sep 06, 2024 - Fri	23	13	18	23	18	13
Sep 05, 2024 - Thu	22	12	17	22	17	12
Sep 04, 2024 - Wed	22	12	17	22	17	12
Sep 03, 2024 - Tue	23	13	18	23	18	13
Sep 02, 2024 - Mon	26	16	21	26	21	16
Sep 01, 2024 - Sun	23	13	18	23	18	13
Aug 31, 2024 - Sat	24	14	19	24	19	14
Aug 30, 2024 - Fri	25	15	20	25	20	15
Aug 29, 2024 - Thu	25	15	20	25	20	15
Aug 28, 2024 - Wed	28	19	24	29	24	19
Aug 27, 2024 - Tue	25	15	20	25	20	15
Aug 26, 2024 - Mon	27	17	22	27	22	17
Aug 25, 2024 - Sun	28	18	23	28	23	18
Aug 24, 2024 - Sat	26	16	21	26	21	16
Aug 23, 2024 - Fri	24	14	19	24	19	14
Aug 22, 2024 - Thu	25	15	20	25	20	15
Aug 21, 2024 - Wed	27	17	22	27	22	17
Aug 20, 2024 - Tue	25	15	20	25	20	15
Aug 19, 2024 - Mon	26	16	21	26	21	16
Aug 18, 2024 - Sun	24	14	19	24	19	14
Aug 17, 2024 - Sat	23	13	18	23	18	13
Aug 16, 2024 - Fri	20	10	15	20	15	10
Aug 15, 2024 - Thu	25	15	20	25	20	15
Aug 14, 2024 - Wed	26	17	22	27	22	17
Aug 13, 2024 - Tue	24	15	20	25	20	15
Aug 12, 2024 - Mon	25	17	22	27	22	17
Aug 11, 2024 - Sun	24	14	19	24	19	14
Aug 10, 2024 - Sat	22	12	17	22	17	12
Aug 09, 2024 - Fri	25	15	20	25	20	15
Aug 08, 2024 - Thu	27	18	23	28	23	18
Aug 07, 2024 - Wed	23	14	19	24	19	14
Aug 06, 2024 - Tue	22	13	18	23	18	13
Aug 05, 2024 - Mon	25	16	21	26	21	16
Aug 04, 2024 - Sun	28	18	23	28	23	18
Aug 03, 2024 - Sat	25	15	20	25	20	15
Aug 02, 2024 - Fri	22	12	17	22	17	12
Aug 01, 2024 - Thu	22	12	17	22	17	12
Jul 31, 2024 - Wed	24	14	19	24	19	14
Jul 30, 2024 - Tue	26	16	21	26	21	16
Jul 29, 2024 - Mon	24	14	19	24	19	14
Jul 28, 2024 - Sun	24	15	20	25	20	15
Jul 27, 2024 - Sat	24	15	20	25	20	15
Jul 26, 2024 - Fri	23	14	19	24	19	14
Jul 25, 2024 - Thu	23	13	18	23	18	13
Jul 24, 2024 - Wed	23	13	18	23	18	13
Jul 23, 2024 - Tue	23	13	18	23	18	13
Jul 22, 2024 - Mon	24	14	19	24	19	14
Jul 21, 2024 - Sun	25	16	21	26	21	16
Jul 20, 2024 - Sat	24	14	19	24	19	14
Jul 19, 2024 - Fri	22	12	17	22	17	12
Jul 18, 2024 - Thu	23	13	18	23	18	13
Jul 17, 2024 - Wed	25	15	20	25	20	15
Jul 16, 2024 - Tue	23	13	18	23	18	13
Jul 15, 2024 - Mon	24	14	19	24	19	14
Jul 14, 2024 - Sun	25	16	21	26	21	16
Jul 13, 2024 - Sat	24	14	19	24	19	14
Jul 02, 2024 - Tue	24	14	19	24	19	14
Jul 01, 2024 - Mon	25	15	20	25	20	15
Jun 30, 2024 - Sun	25	15	20	25	20	15
Jun 29, 2024 - Sat	25	15	20	25	20	15
Jun 28, 2024 - Fri	25	15	20	25	20	15
Jun 27, 2024 - Thu	24	14	19	24	19	14
Jun 26, 2024 - Wed	23	13	18	23	18	13
Jun 25, 2024 - Tue	24	14	19	24	19	14
Jun 24, 2024 - Mon	25	15	20	25	20	15
Jun 23, 2024 - Sun	26	16	21	26	21	16
Jun 22, 2024 - Sat	24	14	19	24	19	14
Jun 21, 2024 - Fri	26	16	21	26	21	16
Jun 20, 2024 - Thu	24	14	19	24	19	14
Jun 19, 2024 - Wed	25	15	20	25	20	15
Jun 18, 2024 - Tue	23	13	18	23	18	13
Jun 17, 2024 - Mon	26	16	21	26	21	16
Jun 16, 2024 - Sun	26	16	21	26	21	16
Jun 15, 2024 - Sat	25	15	20	25	20	15
Jun 14, 2024 - Fri	26	16	21	26	21	16
Jun 13, 2024 - Thu	23	13	18	23	18	13
Jun 12, 2024 - Wed	24	14	19	24	19	14
Jun 11, 2024 - Tue	25	15	20	25	20	15
Jun 10, 2024 - Mon	25	15	20	25	20	15
Jun 09, 2024 - Sun	24	14	19	24	19	14
Jun 08, 2024 - Sat	25	16	21	26	21	16
Jun 07, 2024 - Fri	27	17	22	27	22	17
Jun 06, 2024 - Thu	27	17	22	27	22	17
Jun 05, 2024 - Wed	27	18	23	28	23	18
Jun 04, 2024 - Tue	26	16	21	26	21	16
Jun 03, 2024 - Mon	25	16	21	26	21	16
Jun 02, 2024 - Sun	27	17	22	27	22	17
Jun 01, 2024 - Sat	26	17	22	27	22	17
May 31, 2024 - Fri	26	17	22	27	22	17
May 30, 2024 - Thu	25	16	21	26	21	16
May 29, 2024 - Wed	27	17	22	27	22	17
May 28, 2024 - Tue	27	17	22	27	22	17
May 27, 2024 - Mon	25	15	20	25	20	15
May 26, 2024 - Sun	28	18	23	28	23	18
May 25, 2024 - Sat	24	14	19	24	19	14
May 24, 2024 - Fri	25	15	20	25	20	15
May 23, 2024 - Thu	26	16	21	26	21	16
May 22, 2024 - Wed	27	17	22	27	22	17
May 21, 2024 - Tue	27	17	22	27	22	17
May 20, 2024 - Mon	25	15	20	25	20	15
May 19, 2024 - Sun	26	17	22	27	22	17
May 18, 2024 - Sat	27	17	22	27	22	17
May 17, 2024 - Fri	25	15	20	25	20	15
May 16, 2024 - Thu	27	17	22	27	22	17
May 15, 2024 - Wed	26	16	21	26	21	16
May 14, 2024 - Tue	26	16	21	26	21	16
May 13, 2024 - Mon	25	15	20	25	20	15
May 12, 2024 - Sun	26	16	21	26	21	16
May 11, 2024 - Sat	26	16	21	26	21	16
May 10, 2024 - Fri	25	15	20	25	20	15
May 09, 2024 - Thu	23	13	18	23	18	13
May 08, 2024 - Wed	25	15	20	25	20	15
May 07, 2024 - Tue	25	15	20	25	20	15
May 06, 2024 - Mon	26	16	21	26	21	16
May 05, 2024 - Sun	25	15	20	25	20	15
May 04, 2024 - Sat	24	14	19	24	19	14
May 03, 2024 - Fri	24	14	19	24	19	14
May 02, 2024 - Thu	23	13	18	23	18	13
May 01, 2024 - Wed	26	16	21	26	21	16
Apr 30, 2024 - Tue	25	15	20	25	20	15
Apr 29, 2024 - Mon	25	15	20	25	20	15
Apr 28, 2024 - Sun	21	11	16	21	16	11
Apr 27, 2024 - Sat	25	15	20	25	20	15
Apr 26, 2024 - Fri	21	11	16	21	16	11
Apr 25, 2024 - Thu	22	12	17	22	17	12
Apr 24, 2024 - Wed	23	13	18	23	18	13
Apr 23, 2024 - Tue	21	11	16	21	16	11
Apr 22, 2024 - Mon	25	15	20	25	20	15
Apr 21, 2024 - Sun	25	15	20	25	20	15
Apr 20, 2024 - Sat	27	17	22	27	22	17
Apr 19, 2024 - Fri	24	14	19	24	19	14
Apr 17, 2024 - Wed	25	15	20	25	20	15
Apr 16, 2024 - Tue	25	15	20	25	20	15
Apr 15, 2024 - Mon	25	15	20	25	20	15
Apr 14, 2024 - Sun	20	10	15	20	15	10
Data Summary	4174	2510	3360	4210	3360	2510

Chilling Hours
Date	Method 1 (Hours >= 32 & <= 45 F)	Method 2 (Hours <= 45 F)
Oct 11, 2024 - Fri	0	0
Oct 10, 2024 - Thu	0	0
Oct 09, 2024 - Wed	0	0
Oct 08, 2024 - Tue	0	0
Oct 07, 2024 - Mon	0	0
Oct 06, 2024 - Sun	0	0
Oct 05, 2024 - Sat	0	0
Oct 04, 2024 - Fri	0	0
Oct 03, 2024 - Thu	0	0
Oct 02, 2024 - Wed	0	0
Oct 01, 2024 - Tue	0	0
Sep 30, 2024 - Mon	0	0
Sep 29, 2024 - Sun	0	0
Sep 28, 2024 - Sat	0	0
Sep 27, 2024 - Fri	0	0
Sep 26, 2024 - Thu	0	0
Sep 25, 2024 - Wed	0	0
Sep 24, 2024 - Tue	0	0
Sep 23, 2024 - Mon	0	0
Sep 22, 2024 - Sun	0	0
Sep 21, 2024 - Sat	0	0
Sep 20, 2024 - Fri	0	0
Sep 19, 2024 - Thu	0	0
Sep 18, 2024 - Wed	0	0
Sep 17, 2024 - Tue	0	0
Sep 16, 2024 - Mon	0	0
Sep 15, 2024 - Sun	0	0
Sep 14, 2024 - Sat	0	0
Sep 13, 2024 - Fri	0	0
Sep 12, 2024 - Thu	0	0
Sep 11, 2024 - Wed	0	0
Sep 10, 2024 - Tue	0	0
Sep 09, 2024 - Mon	0	0
Sep 08, 2024 - Sun	0	0
Sep 07, 2024 - Sat	0	0
Sep 06, 2024 - Fri	0	0
Sep 05, 2024 - Thu	0	0
Sep 04, 2024 - Wed	0	0
Sep 03, 2024 - Tue	0	0
Sep 02, 2024 - Mon	0	0
Sep 01, 2024 - Sun	0	0
Aug 31, 2024 - Sat	0	0
Aug 30, 2024 - Fri	0	0
Aug 29, 2024 - Thu	0	0
Aug 28, 2024 - Wed	0	0
Aug 27, 2024 - Tue	0	0
Aug 26, 2024 - Mon	0	0
Aug 25, 2024 - Sun	0	0
Aug 24, 2024 - Sat	0	0
Aug 23, 2024 - Fri	0	0
Aug 22, 2024 - Thu	0	0
Aug 21, 2024 - Wed	0	0
Aug 20, 2024 - Tue	0	0
Aug 19, 2024 - Mon	0	0
Aug 18, 2024 - Sun	0	0
Aug 17, 2024 - Sat	0	0
Aug 16, 2024 - Fri	0	0
Aug 15, 2024 - Thu	0	0
Aug 14, 2024 - Wed	0	0
Aug 13, 2024 - Tue	0	0
Aug 12, 2024 - Mon	0	0
Aug 11, 2024 - Sun	0	0
Aug 10, 2024 - Sat	0	0
Aug 09, 2024 - Fri	0	0
Aug 08, 2024 - Thu	0	0
Aug 07, 2024 - Wed	0	0
Aug 06, 2024 - Tue	0	0
Aug 05, 2024 - Mon	0	0
Aug 04, 2024 - Sun	0	0
Aug 03, 2024 - Sat	0	0
Aug 02, 2024 - Fri	0	0
Aug 01, 2024 - Thu	0	0
Jul 31, 2024 - Wed	0	0
Jul 30, 2024 - Tue	0	0
Jul 29, 2024 - Mon	0	0
Jul 28, 2024 - Sun	0	0
Jul 27, 2024 - Sat	0	0
Jul 26, 2024 - Fri	0	0
Jul 25, 2024 - Thu	0	0
Jul 24, 2024 - Wed	0	0
Jul 23, 2024 - Tue	0	0
Jul 22, 2024 - Mon	0	0
Jul 21, 2024 - Sun	0	0
Jul 20, 2024 - Sat	0	0
Jul 19, 2024 - Fri	0	0
Jul 18, 2024 - Thu	0	0
Jul 17, 2024 - Wed	0	0
Jul 16, 2024 - Tue	0	0
Jul 15, 2024 - Mon	0	0
Jul 14, 2024 - Sun	0	0
Jul 13, 2024 - Sat	0	0
Jul 02, 2024 - Tue	0	0
Jul 01, 2024 - Mon	0	0
Jun 30, 2024 - Sun	0	0
Jun 29, 2024 - Sat	0	0
Jun 28, 2024 - Fri	0	0
Jun 27, 2024 - Thu	0	0
Jun 26, 2024 - Wed	0	0
Jun 25, 2024 - Tue	0	0
Jun 24, 2024 - Mon	0	0
Jun 23, 2024 - Sun	0	0
Jun 22, 2024 - Sat	0	0
Jun 21, 2024 - Fri	0	0
Jun 20, 2024 - Thu	0	0
Jun 19, 2024 - Wed	0	0
Jun 18, 2024 - Tue	0	0
Jun 17, 2024 - Mon	0	0
Jun 16, 2024 - Sun	0	0
Jun 15, 2024 - Sat	0	0
Jun 14, 2024 - Fri	0	0
Jun 13, 2024 - Thu	0	0
Jun 12, 2024 - Wed	0	0
Jun 11, 2024 - Tue	0	0
Jun 10, 2024 - Mon	0	0
Jun 09, 2024 - Sun	0	0
Jun 08, 2024 - Sat	0	0
Jun 07, 2024 - Fri	0	0
Jun 06, 2024 - Thu	0	0
Jun 05, 2024 - Wed	0	0
Jun 04, 2024 - Tue	0	0
Jun 03, 2024 - Mon	0	0
Jun 02, 2024 - Sun	0	0
Jun 01, 2024 - Sat	0	0
May 31, 2024 - Fri	0	0
May 30, 2024 - Thu	0	0
May 29, 2024 - Wed	0	0
May 28, 2024 - Tue	0	0
May 27, 2024 - Mon	0	0
May 26, 2024 - Sun	0	0
May 25, 2024 - Sat	0	0
May 24, 2024 - Fri	0	0
May 23, 2024 - Thu	0	0
May 22, 2024 - Wed	0	0
May 21, 2024 - Tue	0	0
May 20, 2024 - Mon	0	0
May 19, 2024 - Sun	0	0
May 18, 2024 - Sat	0	0
May 17, 2024 - Fri	0	0
May 16, 2024 - Thu	0	0
May 15, 2024 - Wed	0	0
May 14, 2024 - Tue	0	0
May 13, 2024 - Mon	0	0
May 12, 2024 - Sun	0	0
May 11, 2024 - Sat	0	0
May 10, 2024 - Fri	0	0
May 09, 2024 - Thu	0	0
May 08, 2024 - Wed	0	0
May 07, 2024 - Tue	0	0
May 06, 2024 - Mon	0	0
May 05, 2024 - Sun	0	0
May 04, 2024 - Sat	0	0
May 03, 2024 - Fri	0	0
May 02, 2024 - Thu	0	0
May 01, 2024 - Wed	0	0
Apr 30, 2024 - Tue	0	0
Apr 29, 2024 - Mon	0	0
Apr 28, 2024 - Sun	0	0
Apr 27, 2024 - Sat	0	0
Apr 26, 2024 - Fri	0	0
Apr 25, 2024 - Thu	0	0
Apr 24, 2024 - Wed	0	0
Apr 23, 2024 - Tue	0	0
Apr 22, 2024 - Mon	0	0
Apr 21, 2024 - Sun	0	0
Apr 20, 2024 - Sat	0	0
Apr 19, 2024 - Fri	0	0
Apr 17, 2024 - Wed	0	0
Apr 16, 2024 - Tue	0	0
Apr 15, 2024 - Mon	0	0
Apr 14, 2024 - Sun	0	0
Data Summary	0	0

Chilling Hours for the 2024-2025 Season October 1, 2024 thru March 31, 2025
Month	Method 1 (Hours >= 32 & <= 45 F)	Method 2 (Hours <= 45 F)
Oct	0	0
Total	0	0

3-Day Summary

5-Day Summary

7-Day Summary

180-Day Summary

Calculators

Landscape

Crop

Landscape Watering Calculator

1.)	ETo (pet)
2.)	Plant Coefficient
3.)	Adjustment Factor
4.)	Effective Rainfall
5.)

		Precipitation Rate
		Total Run Time
		Irrigations/Week
		Run Time/Irrigation

Crop Watering Calculator

1.)	ETo value from weather data
2.)	Select a crop coefficient
	FAO Coefficients
Or
	Texas High Plains Coefficients
3.)	Select a crop growth stage
4.)	Crop coefficient from growth stage
5.)	Enter your system efficiency
6.)	Effective Rainfall
7.)

		Precipitation Rate
		Total Run Time
		Irrigations/Week
		Run Time/Irrigation

HOW TO USE THIS WEB SITE FOR DETERMINING THE IRRIGATION WATER NEEDS OF PLANTS AND CROPS

METHOD 1: After extracting a PET summary, a calculator appears at the bottom. Fill in any needed variables, and click "Compute" to determine the water needs for your landscape or crop.

METHOD 2: Track the daily and weekly PET values and use this information subjectively to estimate water needs.

METHOD 3: Use the average historic PET values to determine seasonal irrigation water needs and establish monthly irrigation schedules.

ACCESSING PET DATA

There are three different ways to extract PET data from the database:

1. The "Weather Station" drop down list at the top right of every page will access a 14 day weather and PET summary for the selected station.

2. In the "Weather Stations" section of the Browse menu on the left, there is a link to "Search historic data." From this page you may easily view 3, 5, or 7 day PET summaries. Additionally, you may search a given range of dates by selecting "Specify Dates" and then entering a start and stop date.

3. If you utilize this site often, you may want to create a login id. By doing so, you can default the site to your desired weather station, crop/turf type, and the number of days you prefer to view. For more information, see the "Users" section of the Browse menu on the left.

Click the link below to obtain a copy of the Website User's Manual:

Texas ET Network and Website User's Manual

Evapotranspiration (ET) is a measurement of the total amount of water needed to grow plants and crops. This term comes from the words evaporation (i.e., evaporation of water from the soil) and transpiration (i.e., transpiration of water by plants). Different plants have different water requirements, so they have different ET rates.

In 1948, a British scientist name Howard Penman presented a theory (i.e., mathematical model) for calculating ET using local climate data. The resulting Penman equation has been modified since, but forms of this equation are still used today for this purpose.

Since there are thousands of cultivated plants, scientists simplified matters by establishing a standard ET rate for general reference and use. The standard is referred to as the potential evapotranspiration ETo (pet) . This is the "potential" ET since we are assuming the crop is in a deep soil and under well watered conditions. A cool-season grass is widely used for this standard crop. The technical term for this is the "Potential Evapotranspiration of a Grass Reference Crop" or "ETo" for short.

ETo depends on the climate and varies from location to location. Special weather stations are used to collect the climatic data for calculating ETo, including temperature, dew point temperature (relative humidity), wind, and solar radiation. The American Society of Biological and Agricultural Engineers has established a standard for weather stations used for calculation of ET which can be found on this website.

The water requirements of specific crops and turf grasses can be calculated as a fraction of the ETo. This "fraction" is the called the crop coefficient (Kc) or turf coefficient (Tc). Crop coefficients vary depending on the type of plant and its stage of growth. Detailed information on crop and turf coefficients and how to use them is presented at other locations on this website.

We are using the standardized Penman-Monteith method to calculate ETo from the weather station data. This method is also referred to as the ASCE standard method (for more info, see: The ASCE Standardized Reference Evapotranspiration Equation | Books (ascelibrary.org) . This is one of several methods that can be used to determine ETo and ET. Organizations, such as the International Committee on Irrigation and Drainage and the Water Requirements Committee of the American Society of Civil Engineers, have proposed establishing the Penman-Monteith method as a world-wide standard. Such a standard would help facilitate the sharing of ETo data and development of crop coefficients.

For more information on the Penman-Monteith equation see the FAO website . For information on the standardized equation and other methods for determining ET, see the book:

Evapotranspiration and Irrigation Water Requirements, edited by M.E. Jensen, R.D. Burman, and R.G. Allen. Published by the American Society of Civil Engineers, New York, NY. 2016.
https://doi.org/10.1061/9780784414057

Overall Efficiency

0.5-0.8
0.5
0.7
0.8
0.6-0.9¹

TAMU Weather Station Format

L1200X (pyrometer)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Abilene	2.08	2.57	4.14	5.48	6.47	7.65	8.36	7.46	5.48	4.21	2.67	2.08
Amarillo	1.84	2.27	3.73	5.06	5.89	7.51	8.08	7.29	5.61	4.05	2.40	1.78
Austin	2.27	2.72	4.34	5.27	6.39	7.15	7.22	7.25	5.57	4.38	2.74	2.21
Brownsville	2.65	3.03	4.48	5.17	6.03	6.32	6.68	6.65	5.21	4.34	3.01	2.59
College Station	2.20	2.71	4.22	5.20	6.25	6.89	7.10	6.85	5.60	4.30	2.80	2.20
Corpus Christi	2.42	2.95	4.28	5.17	5.95	6.43	6.68	6.65	5.21	4.34	3.01	2.59
Dallas / Ft Worth	2.00	2.46	3.96	5.14	6.21	7.06	7.40	7.25	5.49	4.19	2.59	2.10
Del Rio	2.47	3.01	4.76	6.01	6.98	7.41	7.57	7.41	5.77	4.35	2.91	2.36
El Paso	2.74	3.53	6.07	8.19	9.83	11.12	9.19	8.94	7.69	5.89	3.58	2.49
Galveston	2.20	2.60	4.10	5.00	6.11	6.60	6.20	6.00	5.50	4.20	2.80	2.30
Houston	2.36	2.83	4.32	5.01	6.11	6.57	6.52	6.08	5.57	4.28	2.90	2.35
Lubbock	2.35	2.63	4.41	5.53	6.93	7.73	7.63	7.20	5.54	4.19	2.61	2.33
Midland	2.20	2.78	4.46	5.91	7.21	8.20	9.23	8.62	6.96	4.31	2.78	2.16
Port Arthur	2.25	2.63	3.95	5.09	6.12	6.60	5.81	5.61	5.46	4.18	2.76	2.23
San Angelo	2.88	3.13	5.31	7.01	8.48	9.16	9.29	8.49	6.60	5.08	3.37	2.54
San Antonio	2.42	2.90	4.42	5.47	6.47	6.97	7.31	6.99	5.64	4.44	2.85	2.36
Victoria	2.35	2.87	4.29	5.77	6.39	6.70	6.92	6.70	5.36	4.41	2.93	2.33
Waco	2.13	2.62	4.03	5.31	6.45	7.15	7.40	7.50	5.70	4.41	2.70	2.17
Wichita Falls	1.94	2.46	4.07	5.50	6.70	7.54	7.97	7.72	5.79	4.30	2.62	1.95
© 2024 Texas A&M AgriLife Extension

City	Years of Data
Abilene	52
Amarillo	52
Austin	70
Brownsville	79
College Station	47
Corpus Christi	52
Dallas/Ft. Worth	26
Del Rio	44
El Paso	52
Galveston	59
Houston	31
Lubbock	89
Midland	52
Port Arthur	53
San Angelo	54
San Antonio	54
Victoria	39
Waco	68
Wichita Falls	99
© 2024 Texas A&M AgriLife Extension

Averages were computed using climatic data over the entire period of record available from the National Weather Service and compared to ETo rates based on the standardized Penman-Monteith equation where available. (August 2005)

Average Relative Humidity

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Average
Abilene	55.4	60.2	68.4	77.5	84.2	91.3	94.9	94.3	87.0	77.8	65.6	57.8	76.2
Amarillo	49.2	53.3	61.2	70.9	79.0	88.0	91.2	89.2	82.2	72.5	59.3	51.0	70.6
Austin	60.1	64.4	71.7	79.1	85.2	91.6	95.2	95.7	89.8	81.6	70.2	62.7	78.9
Brownsville	70.3	73.1	78.0	83.2	87.4	91.3	93.0	93.6	90.4	85.1	77.9	71.6	82.9
College Station	59.3	63.6	71.0	78.4	84.8	91.2	94.7	95.3	89.4	80.9	69.9	62.2	78.4
Corpus Christi	66.2	69.7	75.3	81.2	86.0	90.8	93.5	93.6	89.8	83.8	75.2	69.0	81.2
Dallas/Ft. Worth	54.2	59.9	67.8	75.9	83.2	91.6	96.2	95.7	88.3	78.6	66.0	57.3	76.2
Del Rio	63.4	68.2	76.1	83.6	88.8	94.4	97.0	96.7	91.0	82.1	71.6	64.3	81.4
El Paso	57.5	63.3	69.9	78.6	87.2	95.8	95.2	93.0	87.8	78.7	66.3	58.1	77.6
Galveston	59.4	61.5	67.0	73.5	80.2	85.5	87.7	88.1	85.0	78.0	69.1	62.9	74.8
Houston	61.8	66.0	72.7	79.0	85.3	90.8	93.7	93.5	89.0	81.4	71.7	64.9	79.2
Lubbock	53.5	58.7	66.3	75.3	82.7	90.6	92.6	91.1	84.2	75.1	63.2	54.7	74.0
Midland	57.1	62.2	69.8	78.6	86.4	92.9	94.3	93.2	86.4	77.9	66.2	59.0	77.0
Port Arthur	61.6	65.1	71.2	77.8	84.4	89.7	91.8	91.8	88.0	80.7	70.9	64.2	78.1
San Angelo	58.4	63.2	70.8	79.7	86.3	92.2	95.5	94.6	87.6	79.1	67.6	60.5	78.0
San Antonio	61.8	66.2	73.4	80.3	86.1	91.9	95.1	95.2	89.9	82.1	71.3	64.5	79.8
Victoria	63.3	67.1	73.8	80.4	85.7	90.8	93.7	94.0	89.6	83.0	73.7	66.3	80.1
Waco	57.1	61.9	69.4	78.0	84.6	92.1	96.4	96.8	89.9	80.6	68.1	59.9	77.9
Wichita Falls	53.0	58.4	67.0	76.6	83.9	92.6	97.6	97.2	88.6	78.4	64.7	55.6	76.1
© 2024 Texas A&M AgriLife Extension

Average Minimum Temperature (TMin)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Average
Abilene	31.6	36.1	42.9	52.3	61.0	68.8	72.5	71.5	64.7	54.3	42.3	34.2	52.7
Amarillo	21.9	26.3	32.2	41.6	51.8	61.2	65.7	64.1	56.7	44.9	32.1	24.5	43.6
Austin	39.5	43.0	49.3	57.7	65.1	71.4	73.8	73.6	68.8	59.2	48.5	41.7	57.6
Brownsville	51.0	53.7	59.1	65.6	71.1	74.6	75.5	75.3	72.8	65.9	58.6	52.3	64.6
College Station	39.5	42.7	49.4	57.8	65.2	71.2	73.5	73.2	68.4	58.4	48.6	41.8	57.5
Corpus Christi	46.5	49.7	55.9	63.2	69.9	73.8	75.2	75.2	72.3	64.4	55.4	49.0	62.5
Dallas/Ft. Worth	34.0	38.7	46.3	54.0	63.2	70.7	74.8	74.2	67.1	56.0	45.3	36.9	55.1
Del Rio	39.9	43.9	51.3	59.3	66.6	72.5	74.7	74.2	69.3	59.8	48.7	40.9	58.4
El Paso	31.1	35.2	41.2	49.2	57.8	66.6	69.8	68.3	62.0	50.1	38.0	31.7	50.1
Galveston	48.1	50.6	56.8	64.6	71.9	77.3	79.4	79.1	75.6	68.2	58.1	51.6	65.1
Houston	41.3	44.3	51.1	57.8	65.5	71.3	73.2	72.8	68.4	58.7	49.7	43.5	58.1
Lubbock	25.3	29.1	35.4	45.0	54.7	63.5	66.8	65.3	58.4	47.4	35.0	27.3	46.1
Midland	29.7	33.9	40.4	49.3	58.7	66.7	69.2	68.3	61.9	51.6	38.9	31.8	50.0
Port Arthur	42.9	45.6	51.5	59.2	66.6	72.2	74.0	73.5	69.7	59.7	50.5	44.9	59.2
San Angelo	32.6	36.4	43.5	52.4	61.2	68.7	71.5	70.5	64.1	53.8	42.1	34.5	52.6
San Antonio	39.4	43.0	49.9	58.1	66.0	72.1	74.4	73.8	69.2	59.5	48.5	41.6	58.0
Victoria	43.2	46.1	53.1	60.9	68.0	73.2	74.9	74.6	70.6	61.5	52.5	45.5	60.3
Waco	36.2	40.2	46.8	55.8	64.0	71.4	74.7	74.3	67.9	57.3	46.3	38.7	56.1
Wichita Falls	29.7	34.1	41.2	50.9	59.9	68.7	72.9	72.1	64.5	53.4	40.6	32.8	51.7
© 2024 Texas A&M AgriLife Extension

Average Mean Temperature (TMean)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Average
Abilene	43.5	48.2	55.6	64.9	72.6	80.1	83.7	82.9	75.8	66.0	53.9	46.0	64.4
Amarillo	35.6	39.8	46.7	56.3	65.4	74.6	78.5	76.7	69.4	58.7	45.7	37.8	57.1
Austin	49.8	53.7	60.5	68.4	75.2	81.5	84.5	84.6	79.3	70.4	59.4	52.2	68.3
Brownsville	60.6	63.4	68.5	74.4	79.2	82.9	84.2	84.4	81.6	75.5	68.2	62.0	73.8
College Station	49.4	53.2	60.2	68.1	75.0	81.2	84.1	84.3	78.9	69.7	59.3	52.0	67.9
Corpus Christi	56.4	59.7	65.6	72.2	77.8	82.3	84.3	84.4	81.1	74.1	65.3	59.0	71.8
Dallas/Ft. Worth	44.1	49.3	57.1	65.0	73.2	81.1	85.5	84.9	77.7	67.3	55.7	47.1	65.7
Del Rio	51.7	56.0	63.7	71.4	77.7	83.4	85.8	85.5	80.2	70.9	60.2	52.6	69.9
El Paso	44.3	49.3	55.6	63.9	72.5	81.2	82.5	80.7	74.9	64.4	52.2	44.9	63.9
Galveston	53.8	56.1	61.9	69.1	76.1	81.4	83.5	83.6	80.3	73.1	63.6	57.2	70.0
Houston	51.6	55.2	61.9	68.4	75.4	81.0	83.5	83.1	78.7	70.0	60.7	54.2	68.6
Lubbock	39.4	43.9	50.9	60.2	68.7	77.0	79.7	78.2	71.3	61.2	49.1	41.0	60.1
Midland	43.4	48.0	55.1	63.9	72.5	79.8	81.8	80.7	74.2	64.7	52.6	45.4	63.5
Port Arthur	52.2	55.4	61.4	68.5	75.5	80.9	82.9	82.6	78.8	70.2	60.7	54.6	68.6
San Angelo	45.5	49.8	57.1	66.0	73.8	80.5	83.5	82.5	75.9	66.4	54.8	47.5	65.3
San Antonio	50.6	54.6	61.6	69.2	76.0	82.0	84.7	84.5	79.5	70.8	59.9	53.1	68.9
Victoria	53.3	56.6	63.4	70.7	76.8	82.0	84.3	84.3	80.1	72.2	63.1	55.9	70.2
Waco	46.7	51.1	58.1	66.9	74.3	81.8	85.6	85.5	78.9	68.9	57.2	49.3	67.0
Wichita Falls	41.4	46.3	54.1	63.7	71.9	80.7	85.2	84.6	76.6	65.9	52.6	44.2	63.9
© 2024 Texas A&M AgriLife Extension

City	Years of Data
Abilene	52
Amarillo	52
Austin	70
Brownsville	79
College Station	47
Corpus Christi	52
Dallas/Ft. Worth	26
Del Rio	44
El Paso	52
Galveston	59
Houston	31
Lubbock	89
Midland	52
Port Arthur	53
San Angelo	54
San Antonio	54
Victoria	39
Waco	68
Wichita Falls	99
© 2024 Texas A&M AgriLife Extension

Average Maximum Temperature (TMax)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Average
Abilene	55.4	60.2	68.4	77.5	84.2	91.3	94.9	94.3	87.0	77.8	65.6	57.8	76.2
Amarillo	49.2	53.3	61.2	70.9	79.0	88.0	91.2	89.2	82.2	72.5	59.3	51.0	70.6
Austin	60.1	64.4	71.7	79.1	85.2	91.6	95.2	95.7	89.8	81.6	70.2	62.7	78.9
Brownsville	70.3	73.1	78.0	83.2	87.4	91.3	93.0	93.6	90.4	85.1	77.9	71.6	82.9
College Station	59.3	63.6	71.0	78.4	84.8	91.2	94.7	95.3	89.4	80.9	69.9	62.2	78.4
Corpus Christi	66.2	69.7	75.3	81.2	86.0	90.8	93.5	93.6	89.8	83.8	75.2	69.0	81.2
Dallas/Ft. Worth	54.2	59.9	67.8	75.9	83.2	91.6	96.2	95.7	88.3	78.6	66.0	57.3	76.2
Del Rio	63.4	68.2	76.1	83.6	88.8	94.4	97.0	96.7	91.0	82.1	71.6	64.3	81.4
El Paso	57.5	63.3	69.9	78.6	87.2	95.8	95.2	93.0	87.8	78.7	66.3	58.1	77.6
Galveston	59.4	61.5	67.0	73.5	80.2	85.5	87.7	88.1	85.0	78.0	69.1	62.9	74.8
Houston	61.8	66.0	72.7	79.0	85.3	90.8	93.7	93.5	89.0	81.4	71.7	64.9	79.2
Lubbock	53.5	58.7	66.3	75.3	82.7	90.6	92.6	91.1	84.2	75.1	63.2	54.7	74.0
Midland	57.1	62.2	69.8	78.6	86.4	92.9	94.3	93.2	86.4	77.9	66.2	59.0	77.0
Port Arthur	61.6	65.1	71.2	77.8	84.4	89.7	91.8	91.8	88.0	80.7	70.9	64.2	78.1
San Angelo	58.4	63.2	70.8	79.7	86.3	92.2	95.5	94.6	87.6	79.1	67.6	60.5	78.0
San Antonio	61.8	66.2	73.4	80.3	86.1	91.9	95.1	95.2	89.9	82.1	71.3	64.5	79.8
Victoria	63.3	67.1	73.8	80.4	85.7	90.8	93.7	94.0	89.6	83.0	73.7	66.3	80.1
Waco	57.1	61.9	69.4	78.0	84.6	92.1	96.4	96.8	89.9	80.6	68.1	59.9	77.9
Wichita Falls	53.0	58.4	67.0	76.6	83.9	92.6	97.6	97.2	88.6	78.4	64.7	55.6	76.1
© 2024 Texas A&M AgriLife Extension

Average Minimum Temperature (TMin)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Average
Abilene	31.6	36.1	42.9	52.3	61.0	68.8	72.5	71.5	64.7	54.3	42.3	34.2	52.7
Amarillo	21.9	26.3	32.2	41.6	51.8	61.2	65.7	64.1	56.7	44.9	32.1	24.5	43.6
Austin	39.5	43.0	49.3	57.7	65.1	71.4	73.8	73.6	68.8	59.2	48.5	41.7	57.6
Brownsville	51.0	53.7	59.1	65.6	71.1	74.6	75.5	75.3	72.8	65.9	58.6	52.3	64.6
College Station	39.5	42.7	49.4	57.8	65.2	71.2	73.5	73.2	68.4	58.4	48.6	41.8	57.5
Corpus Christi	46.5	49.7	55.9	63.2	69.9	73.8	75.2	75.2	72.3	64.4	55.4	49.0	62.5
Dallas/Ft. Worth	34.0	38.7	46.3	54.0	63.2	70.7	74.8	74.2	67.1	56.0	45.3	36.9	55.1
Del Rio	39.9	43.9	51.3	59.3	66.6	72.5	74.7	74.2	69.3	59.8	48.7	40.9	58.4
El Paso	31.1	35.2	41.2	49.2	57.8	66.6	69.8	68.3	62.0	50.1	38.0	31.7	50.1
Galveston	48.1	50.6	56.8	64.6	71.9	77.3	79.4	79.1	75.6	68.2	58.1	51.6	65.1
Houston	41.3	44.3	51.1	57.8	65.5	71.3	73.2	72.8	68.4	58.7	49.7	43.5	58.1
Lubbock	25.3	29.1	35.4	45.0	54.7	63.5	66.8	65.3	58.4	47.4	35.0	27.3	46.1
Midland	29.7	33.9	40.4	49.3	58.7	66.7	69.2	68.3	61.9	51.6	38.9	31.8	50.0
Port Arthur	42.9	45.6	51.5	59.2	66.6	72.2	74.0	73.5	69.7	59.7	50.5	44.9	59.2
San Angelo	32.6	36.4	43.5	52.4	61.2	68.7	71.5	70.5	64.1	53.8	42.1	34.5	52.6
San Antonio	39.4	43.0	49.9	58.1	66.0	72.1	74.4	73.8	69.2	59.5	48.5	41.6	58.0
Victoria	43.2	46.1	53.1	60.9	68.0	73.2	74.9	74.6	70.6	61.5	52.5	45.5	60.3
Waco	36.2	40.2	46.8	55.8	64.0	71.4	74.7	74.3	67.9	57.3	46.3	38.7	56.1
Wichita Falls	29.7	34.1	41.2	50.9	59.9	68.7	72.9	72.1	64.5	53.4	40.6	32.8	51.7
© 2024 Texas A&M AgriLife Extension

Average Mean Temperature (TMean)

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Average
Abilene	43.5	48.2	55.6	64.9	72.6	80.1	83.7	82.9	75.8	66.0	53.9	46.0	64.4
Amarillo	35.6	39.8	46.7	56.3	65.4	74.6	78.5	76.7	69.4	58.7	45.7	37.8	57.1
Austin	49.8	53.7	60.5	68.4	75.2	81.5	84.5	84.6	79.3	70.4	59.4	52.2	68.3
Brownsville	60.6	63.4	68.5	74.4	79.2	82.9	84.2	84.4	81.6	75.5	68.2	62.0	73.8
College Station	49.4	53.2	60.2	68.1	75.0	81.2	84.1	84.3	78.9	69.7	59.3	52.0	67.9
Corpus Christi	56.4	59.7	65.6	72.2	77.8	82.3	84.3	84.4	81.1	74.1	65.3	59.0	71.8
Dallas/Ft. Worth	44.1	49.3	57.1	65.0	73.2	81.1	85.5	84.9	77.7	67.3	55.7	47.1	65.7
Del Rio	51.7	56.0	63.7	71.4	77.7	83.4	85.8	85.5	80.2	70.9	60.2	52.6	69.9
El Paso	44.3	49.3	55.6	63.9	72.5	81.2	82.5	80.7	74.9	64.4	52.2	44.9	63.9
Galveston	53.8	56.1	61.9	69.1	76.1	81.4	83.5	83.6	80.3	73.1	63.6	57.2	70.0
Houston	51.6	55.2	61.9	68.4	75.4	81.0	83.5	83.1	78.7	70.0	60.7	54.2	68.6
Lubbock	39.4	43.9	50.9	60.2	68.7	77.0	79.7	78.2	71.3	61.2	49.1	41.0	60.1
Midland	43.4	48.0	55.1	63.9	72.5	79.8	81.8	80.7	74.2	64.7	52.6	45.4	63.5
Port Arthur	52.2	55.4	61.4	68.5	75.5	80.9	82.9	82.6	78.8	70.2	60.7	54.6	68.6
San Angelo	45.5	49.8	57.1	66.0	73.8	80.5	83.5	82.5	75.9	66.4	54.8	47.5	65.3
San Antonio	50.6	54.6	61.6	69.2	76.0	82.0	84.7	84.5	79.5	70.8	59.9	53.1	68.9
Victoria	53.3	56.6	63.4	70.7	76.8	82.0	84.3	84.3	80.1	72.2	63.1	55.9	70.2
Waco	46.7	51.1	58.1	66.9	74.3	81.8	85.6	85.5	78.9	68.9	57.2	49.3	67.0
Wichita Falls	41.4	46.3	54.1	63.7	71.9	80.7	85.2	84.6	76.6	65.9	52.6	44.2	63.9
© 2024 Texas A&M AgriLife Extension

City	Years of Data
Abilene	52
Amarillo	52
Austin	70
Brownsville	79
College Station	47
Corpus Christi	52
Dallas/Ft. Worth	26
Del Rio	44
El Paso	52
Galveston	59
Houston	31
Lubbock	89
Midland	52
Port Arthur	53
San Angelo	54
San Antonio	54
Victoria	39
Waco	68
Wichita Falls	99
© 2024 Texas A&M AgriLife Extension

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Amarillo	0.59	0.58	0.93	1.24	2.74	3.40	2.88	2.99	1.89	1.41	0.62	0.57
Austin	2.11	2.41	2.05	3.01	4.38	3.46	2.05	2.23	3.38	3.35	2.28	2.46
Brownsville	1.33	1.31	0.90	1.63	2.31	2.85	1.69	2.46	4.95	3.36	1.61	1.18
College Station	2.87	2.88	2.50	3.77	4.73	3.79	2.24	2.43	4.30	3.64	3.07	3.15
Corpus Christi	1.57	1.88	1.33	2.06	3.09	3.19	1.84	3.33	5.30	3.54	1.56	1.60
Dallas / Ft Worth	1.94	2.44	3.12	3.15	5.43	3.18	2.09	2.10	2.42	4.01	2.43	2.50
Del Rio	0.53	0.91	0.86	1.89	2.39	1.90	1.54	1.72	2.59	1.94	0.85	0.65
El Paso	0.42	0.41	0.30	0.21	0.33	0.72	1.56	1.48	1.42	0.72	0.35	0.62
Galveston	3.33	2.58	2.43	2.55	3.46	4.14	3.77	4.23	5.36	3.17	3.33	3.59
Houston	3.70	2.99	3.48	3.49	5.22	5.13	3.25	3.79	4.45	4.65	3.89	3.64
Lubbock	0.52	0.61	0.82	1.26	2.62	2.67	2.12	2.07	2.53	1.99	0.62	0.64
Midland	0.54	0.61	0.47	0.77	2.02	1.59	1.83	1.65	2.04	1.56	0.58	0.53
Port Arthur	4.86	3.96	3.30	3.86	5.02	5.68	5.31	5.04	5.77	4.20	4.22	5.13
San Angelo	0.83	1.05	0.93	1.68	2.86	2.20	1.16	1.77	2.78	2.21	0.96	0.78
San Antonio	1.61	1.90	1.68	2.53	3.99	3.57	1.83	2.58	3.29	3.29	2.11	1.72
Victoria	2.28	2.12	2.08	2.93	4.95	4.77	3.03	3.08	5.37	3.72	2.51	2.33
Waco	2.07	2.39	2.51	3.43	4.59	2.80	1.88	1.66	3.07	2.91	2.48	2.49
Wichita Falls	1.08	1.31	1.91	2.72	4.59	3.36	2.05	2.16	2.94	2.69	1.55	1.56
Abilene	1.01	1.10	1.19	2.09	3.31	2.90	2.09	2.45	2.75	2.48	1.28	1.04
© 2024 Texas A&M AgriLife Extension

City	Years of Data
Abilene	52
Amarillo	52
Austin	70
Brownsville	79
College Station	47
Corpus Christi	52
Dallas/Ft. Worth	26
Del Rio	44
El Paso	52
Galveston	59
Houston	31
Lubbock	89
Midland	52
Port Arthur	53
San Angelo	54
San Antonio	54
Victoria	39
Waco	68
Wichita Falls	99
© 2024 Texas A&M AgriLife Extension

Station	Status	Data Available	Last Error Message	Date Error Occurred
Abilene	Updated	01/05/2024 - 10/10/2024	No Error Logged
Allen	Updated	03/06/2015 - 10/10/2024	No Error Logged
Alvarado	Updated	07/08/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	09/06/2023
Argyle	Updated	05/26/2018 - 10/10/2024	Solar radiation data out of range:-7999	07/26/2024
Aubrey	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:-7.1991	12/12/2023
Austin (LCRA Redbud)	Updated	09/11/2014 - 10/10/2024	Solar radiation data out of range:0	06/26/2022
Ballinger	Updated	12/17/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Ben Wheeler	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Blum	Updated	07/08/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	09/21/2024
Bryan	Updated	08/05/2014 - 10/10/2024	Solar radiation data out of range:-7999	04/24/2024
Buda	Updated	08/08/2018 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Burnet	Updated	07/26/2017 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Canyon	Updated	12/09/2022 - 10/10/2024	Solar radiation data out of range:-7999	07/02/2024
Carthage	Updated	12/10/2020 - 10/10/2024	Temperature data out of range:-304.24	10/09/2024
Cash	Not Updated	04/01/2016 - 09/28/2024	Solar radiation data out of range:-7999	01/29/2024
Cedar Creek	Not Updated	12/13/2020 - 12/17/2023	Solar radiation data out of range:0	06/28/2022
Cedar Park	Updated	02/11/2015 - 10/10/2024	Solar radiation data out of range:0	06/26/2022
Conroe	Updated	09/05/2013 - 10/10/2024	Solar radiation data out of range:0	06/29/2022
Corpus Christi AgriLife	Updated	06/08/2022 - 10/10/2024	Solar radiation data out of range:500	07/07/2022
Corpus Christi North	Updated	08/15/2023 - 10/10/2024	Solar radiation data out of range:-7999	07/13/2024
Corpus Christi South	Updated	08/15/2023 - 10/10/2024	Solar radiation data out of range:-7999	09/10/2024
Crystal City	Updated	03/29/2024 - 10/10/2024	No Error Logged
Dallas AgriLife Center	Updated	04/07/2008 - 10/10/2024	Solar radiation data out of range:-7999	10/11/2024
Delta Lake	Not Updated	03/13/2019 - 09/23/2024	Solar radiation data out of range:-7999	09/16/2024
Detroit	Not Updated	01/05/2024 - 07/15/2024	Soil temperature data out of range:-14366.2	10/10/2024
Dickinson	Updated	07/27/2016 - 10/10/2024	Temperature data out of range:-7999	11/14/2023
Dripping Springs	Updated	02/11/2015 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Driscoll	Updated	06/07/2022 - 10/10/2024	No Error Logged
Fabens	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Farmersville	Updated	11/15/2012 - 10/10/2024	Solar radiation data out of range:0	06/29/2022
Forestburg	Updated	12/13/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Forney	Not Updated	12/03/2012 - 10/05/2024	No Error Logged
Fort Stockton East	Updated	07/08/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	03/27/2024
Fort Stockton West	Updated	12/10/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	09/18/2024
Fort Worth - NOAA	Updated	08/25/2011 - 10/10/2024	Solar radiation data out of range:-0.0002808	07/11/2022
Freer	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Garland	Updated	03/07/2015 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Garwood	Updated	12/10/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	11/01/2023
Goliad	Updated	12/13/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Halfway	Updated	06/28/2012 - 10/10/2024	Solar radiation data out of range:-28.7964	04/08/2024
Hebbronville	Not Updated	04/20/2022 - 07/25/2023	Solar radiation data out of range:-7.1991	08/17/2022
Highland-University Park	Not Updated	04/19/2016 - 09/22/2024	Solar radiation data out of range:0	06/27/2022
Houston	Updated	07/27/2016 - 10/10/2024	Solar radiation data out of range:-7999	04/29/2023
Houston North	Updated	07/11/2023 - 10/10/2024	Solar radiation data out of range:-7999	09/06/2024
Huntsville	Updated	01/22/2010 - 10/10/2024	Relative humidity data out of range:108	04/21/2023
Irving North	Updated	10/08/2013 - 10/10/2024	Solar radiation data out of range:0	06/29/2022
Irving South	Updated	10/08/2013 - 10/10/2024	Solar radiation data out of range:-7999	10/03/2023
Jersey Village	Not Updated	03/06/2020 - 09/09/2024	Solar radiation data out of range:-7999	04/21/2024
Kennedale	Updated	11/12/2014 - 10/10/2024	Solar radiation data out of range:-7.2E-05	07/11/2022
Kingsville	Updated	12/20/2020 - 10/10/2024	Temperature data out of range:-262.84	11/27/2023
La Gloria	Updated	07/08/2020 - 10/10/2024	Temperature data out of range:-38.542	09/02/2024
La Villa	Updated	12/10/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Ladonia	Updated	05/18/2019 - 10/10/2024	Solar radiation data out of range:-7999	12/04/2023
Lakeway	Updated	02/11/2015 - 10/10/2024	Solar radiation data out of range:0	06/26/2022
Lewisville	Updated	06/26/2015 - 10/10/2024	Solar radiation data out of range:-7999	02/15/2024
Lubbock	Updated	06/02/2020 - 10/10/2024	Solar radiation data out of range:-7999	07/20/2024
Marble Falls	Updated	09/11/2014 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Marfa	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:-7.1991	09/19/2024
McKinney	Updated	11/15/2012 - 10/10/2024	Temperature data out of range:-46.09	04/20/2023
Medina	Updated	05/25/2021 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Melissa	Not Updated	03/16/2016 - 02/12/2024	Solar radiation data out of range:0	06/12/2022
Melissa RD121	Not Updated	04/01/2016 - 09/22/2024	Solar radiation data out of range:0	06/25/2022
Memorial Village	Updated	09/14/2017 - 10/10/2024	Solar radiation data out of range:0	06/27/2022
Menard	Updated	07/08/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	02/14/2024
Mesquite	Updated	12/03/2012 - 10/10/2024	Solar radiation data out of range:0	06/27/2022
Murphy	Not Updated	03/16/2016 - 08/19/2024	Solar radiation data out of range:-7999	09/11/2024
Naples	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:-7.1991	11/30/2022
Nasho	Updated	07/05/2018 - 10/11/2024	Solar radiation data out of range:-7999	06/11/2024
Nocona	Updated	12/10/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Overton	Updated	06/07/2004 - 10/10/2024	Solar radiation data out of range:-7999	05/08/2023
Ozona-Sonora	Updated	07/08/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	09/25/2024
Pflugerville	Updated	02/11/2015 - 10/10/2024	Solar radiation data out of range:0	06/27/2022
Plano	Updated	11/15/2012 - 10/10/2024	Solar radiation data out of range:0	06/29/2022
Princeton	Updated	03/07/2015 - 10/10/2024	Solar radiation data out of range:0	06/24/2022
Prosper	Updated	07/21/2021 - 10/10/2024	Solar radiation data out of range:-7999	07/26/2024
Providence Village	Updated	06/26/2015 - 10/10/2024	Solar radiation data out of range:-7999	04/18/2024
Refugio	Updated	12/22/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	07/16/2024
Richardson	Updated	03/06/2015 - 10/10/2024	Solar radiation data out of range:0	06/27/2022
Richmond North	Updated	01/01/2018 - 10/10/2024	Solar radiation data out of range:-7999	04/24/2024
Richmond South	Updated	07/27/2016 - 10/10/2024	Solar radiation data out of range:-7999	05/14/2023
Rockwall	Updated	12/03/2012 - 10/10/2024	Solar radiation data out of range:0	06/29/2022
Round Rock	Updated	12/17/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Royse City	Updated	03/07/2015 - 10/10/2024	Solar radiation data out of range:0	06/25/2022
Sachse	Not Updated	03/23/2016 - 04/04/2024	No Error Logged
San Angelo	Not Updated	11/03/2016 - 12/25/2022	Solar radiation data out of range:0	06/29/2022
San Antonio North	Updated	09/02/2005 - 10/10/2024	Solar radiation data out of range:-7999	09/03/2024
San Benito	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:-7.1991	11/27/2023
San Saba	Updated	12/13/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	09/06/2024
Seagoville	Updated	01/21/2016 - 10/10/2024	Solar radiation data out of range:0	06/27/2022
Seguin	Updated	12/10/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Shafter	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:-7.1991	08/09/2022
Southlake	Updated	10/16/2015 - 10/10/2024	Wind speed data out of range:194.68	09/06/2024
Spicewood	Updated	07/26/2017 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
Spring	Updated	09/01/2016 - 10/10/2024	Solar radiation data out of range:-7999	04/10/2024
Springtown	Updated	07/08/2020 - 10/10/2024	Solar radiation data out of range:0	06/28/2022
TAMU Irrigation Lab	Not Updated	04/07/2021 - 10/08/2024	Temperature data out of range:-124.3	04/13/2023
TAMU Turf Lab	Updated	11/08/2012 - 10/10/2024	Temperature data out of range:-74.88	01/03/2023
Tarrant West	Updated	11/12/2014 - 10/10/2024	Solar radiation data out of range:-3.6E-05	07/11/2022
Tawakoni	Updated	01/21/2016 - 10/10/2024	Solar radiation data out of range:0	06/27/2022
Uvalde Research	Updated	11/06/2010 - 10/10/2024	Solar radiation data out of range:0	06/23/2022
Van Horn North	Updated	12/10/2020 - 10/10/2024	Solar radiation data out of range:-7.1991	03/23/2024
Van Horn South	Updated	07/08/2020 - 10/10/2024	Temperature data out of range:-14366.2	10/24/2023
Victoria County West	Updated	04/20/2022 - 10/10/2024	Solar radiation data out of range:-7.1991	04/17/2023
Waco	Not Updated	02/14/2012 - 04/20/2024	Relative humidity data out of range:120	02/26/2024
Water Valley	Updated	04/02/2024 - 10/10/2024	Solar radiation data out of range:-7.1991	08/03/2024
Wylie	Updated	11/13/2012 - 10/10/2024	Solar radiation data out of range:0	06/21/2022

Using PET for Determining Crop Water Requirements and Irrigation Scheduling

Click to download a hard copy of the grower's guide

Contents

I. How to Use

Adjusting for Irrigation System Efficiency

Adjusting for Rainfall

II. Where to Find PET Information

III. What is Potential Evapotranspiration (PET)?

IV. Crop Coefficients

Choosing and Using Crop Coefficients

Soil Moisture Monitoring

Table 1. Sorghum Crop Coefficients

Table 2. Cotton Crop Coefficients

Table 3. Corn Crop Coefficients

V. Irrigation System Efficiencies

Table 4. Typical overall On-Farm Efficiencies

VI. Understanding FAO Crop Coefficients

Table 5. FAO Mean Crop Coefficients, Kc.

Table 6. FAO General Crop Growth Stages.

VII. Acknowledgments

I. HOW TO USE PET

To calculate the water requirements of a crop, we multiply the PET times the crop coefficient using the following equation:

PET x Kc = crop water requirements (equation 1)

where:

PET is the sum of daily PET over the time period of interest, such as the 3-day total, the weekly total, etc.

Kc is the crop coefficient corresponding to the current stage of crop growth.

Example 1: the 5-day PET total is 1.32 inches. My sorghum is in the "heading" growth stage. What are the water requirements? (Note: from Table 1, the "heading" crop coefficient is 1.10)

1.32 inches x 1.10 = 1.45 inches

Thus, I need to apply 1.45 inches to replace the water used by the sorghum in the last 5 days.

Adjusting for Irrigation System Efficiency

It may be necessary to increase the amount of irrigation water in order to compensate for poor irrigation system efficiency. Irrigation system efficiency is defined in Section V of this guide. Table 4 gives the typical ranges of on-farm irrigation systems.

To adjust for irrigation system efficiency, use the following equation:

PET x Kc ÷ Eff = irrigation water requirements (equation 2)

where:

Eff is the overall efficiency of the irrigation system.

Example 2. I am irrigating with a low-pressure center pivot. I estimate that my overall system efficiency is 85%. What are my irrigation water requirements for the sorghum in example 1?

1.32 inches x 1.10 ÷ 0.85 = 1.71 inches.

Adjusting for Rainfall

Rainfall reduces the amount of water we must supply by irrigation to meet plant water requirements. However, not all rainfall becomes available for use by plants and crops. Depending on such factors as soil type, duration and intensity of rainfall, soil moisture levels, etc., a portion of the rainfall will be lost to runoff and deep percolation (water moving below the root zone).

In irrigation scheduling, the term " effective rainfall " refers to that portion of rainfall which infiltrates and is stored in the root zone. Effective rainfall must be estimated for each field and rainfall event. The irrigation requirement determined with equations (1) or (2) should be reduced by the amount of effective rainfall.

Alternatively, soil moisture monitoring devices can be use to determine soil moisture levels and to determine when irrigations should be re-started following rains.

II. WHERE TO FIND PET INFORMATION

For persons with Internet access, PET and weather information is provided for about 10 locations in Central and South Texas on the Texas PET Web Site. The address is:

http://texaset.tamu.edu

Persons without Internet access should contact their water district or County Extension Agent to see if this information is being provided locally in another way.

Persons on the Texas High Plains should contact the Texas A&M Research and Extension Center in Amarillo at (806) 359-5401 about subscription to the High Plains PET Network where PET data is sent out every three days by FAX.

III. WHAT IS POTENTIAL EVAPOTRANSPIRATION (PET)?

Evapotranspiration (ET) is a measurement of the total amount of water needed to grow plants and crops. This term comes from the words evaporation (i.e., evaporation of water from the soil) and transpiration (i.e., transpiration of water by plants). Different plants have different water requirements, so they have different ET rates.

Since there are thousands of cultivated plants, we have tried to simplified matters by establishing a standard ET rate for general reference and use. The standard is referred to as the potential evapotranspiration (PET). This is the potential ET since we are assuming the crop is in a deep soil and under well watered conditions. The standard crop we are using is a cool season grass which is 4-inches tall. The technical term for this is the " Potential Evapotranspiration of a Grass Reference Crop " or "PET" for short.

PET depends on the climate and varies from location to location. Special weather stations are used to collect the climatic data for calculating PET, including temperature, dew point temperature (relative humidity), wind speed, and solar radiation.

The water requirements of specific crops are calculated as a percentage of the PET. This "percentage" is the called the crop coefficient (Kc). Crop coefficients depend on the type of crop and its stage of growth. Detailed information on crop coefficients are given later.

We are using the Penman-Monteith method to calculate PET from the weather station data. This is one of a number of methods that can be used to determine PET and ET. Several organizations, such as the International Committee on Irrigation and Drainage and the Water Requirements Committee of the American Society of Civil Engineers have proposed establishing the Penman-Monteith method as a world-wide standard. Such a standard would help facilitate the sharing of PET data and development of crop coefficients.

No Stress	1.0
Low Stress	0.8
Normal Stress	0.6
High Stress	0.5
Very High Stress	0.4