Marfa's 12 Day Weather Summary Sponsored by Texas Water Development Board
Date ETo
(in)
Max Temp
(f)
Min Temp
(f)
Min RH
(%)
Solar Rad.
(MJ/m2)
Rainfall
(in)
Wind 4am
(mph)
Wind 4pm
(mph)
Battery
(v)
Mar 20, 2025 - Thu 0.20 65 28 3 27.50 0.00 6.42 8.17
Mar 19, 2025 - Wed 0.27 67 43 2 27.81 0.00 9.79 14.97
Mar 18, 2025 - Tue 0.32 85 44 1 26.73 0.00 0.34 12.47
Mar 17, 2025 - Mon 0.27 81 34 1 24.85 0.00 4.42 12.11
Mar 16, 2025 - Sun 0.19 70 26 5 27.04 0.00 2.91 5.21
Mar 15, 2025 - Sat 0.15 56 33 23 20.14 0.00 5.88 17.84
Mar 14, 2025 - Fri 0.27 74 48 5 23.40 0.00 10.72 13.10
Mar 12, 2025 - Wed 0.24 71 43 5 25.97 0.00 4.26 12.74
Mar 11, 2025 - Tue 0.23 79 32 1 26.61 0.00 5.01 9.41
Mar 10, 2025 - Mon 0.19 70 26 4 26.34 0.00 4.79 8.65
Mar 08, 2025 - Sat 0.18 58 39 9 20.51 0.00 4.94 12.26
Mar 07, 2025 - Fri 0.25 78 43 0 25.59 0.00 6.06 15.03
Data Summary 2.76 85 26 4 302.50 0.00 5.46 11.83  
Detailed Crop Weather Data
Date Average Temp
(f)
Dew Point
(f)
Max Dewpoint
(f)
Min Dewpoint
(f)
Wind Run
(miles/day)
Soil Temp
(f)
Mar 20, 2025 - Thu 49 19 33 4 630 59
Mar 19, 2025 - Wed 56 23 34 12 1,037 62
Mar 18, 2025 - Tue 68 35 51 14 859 61
Mar 17, 2025 - Mon 58 27 48 8 671 58
Mar 16, 2025 - Sun 50 24 38 13 445 56
Mar 15, 2025 - Sat 48 25 34 14 946 58
Mar 14, 2025 - Fri 62 31 42 17 925 60
Mar 12, 2025 - Wed 60 29 40 10 802 58
Mar 11, 2025 - Tue 56 24 45 5 508 57
Mar 10, 2025 - Mon 49 20 38 2 515 55
Mar 08, 2025 - Sat 49 23 30 14 884 59
Mar 07, 2025 - Fri 66 36 43 24 786 61
Data Summary 55 26 51 2 9,009 58
Heat Units
Date Corn
(heat units)
Cotton
(heat units)
Sorghum
(heat units)
50 Degree
(heat units)
55 Degree
(heat units)
60 Degree
(heat units)
Mar 20, 2025 - Thu 0 0 0 0 0 0
Mar 19, 2025 - Wed 5 0 0 5 0 0
Mar 18, 2025 - Tue 14 4 9 14 9 4
Mar 17, 2025 - Mon 8 0 3 8 3 0
Mar 16, 2025 - Sun 0 0 0 0 0 0
Mar 15, 2025 - Sat 0 0 0 0 0 0
Mar 14, 2025 - Fri 11 1 6 11 6 1
Mar 12, 2025 - Wed 7 0 2 7 2 0
Mar 11, 2025 - Tue 5 0 0 5 0 0
Mar 10, 2025 - Mon 0 0 0 0 0 0
Mar 08, 2025 - Sat 0 0 0 0 0 0
Mar 07, 2025 - Fri 10 0 5 10 5 0
Data Summary 60 5 25 60 25 5
Chilling Hours
Date Method 1
(Hours >= 32 & <= 45 F)
Method 2
(Hours <= 45 F)
Mar 20, 2025 - Thu 7 10
Mar 19, 2025 - Wed 2 2
Mar 18, 2025 - Tue 2 2
Mar 17, 2025 - Mon 10 10
Mar 16, 2025 - Sun 9 11
Mar 15, 2025 - Sat 6 6
Mar 14, 2025 - Fri 0 0
Mar 12, 2025 - Wed 4 4
Mar 11, 2025 - Tue 10 10
Mar 10, 2025 - Mon 7 11
Mar 08, 2025 - Sat 8 8
Mar 07, 2025 - Fri 1 1
Data Summary 66 75
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
Nov 141 141
Dec 240 269
Jan 279 471
Feb 196 250
Mar 104 115
Total 960 1246

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