Marfa's 7 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)
Apr 18, 2025 - Fri 0.24 80 64 9 8.34 0.00 2.10 11.91
Apr 17, 2025 - Thu 0.33 92 52 3 30.80 0.00 3.59 13.56
Apr 16, 2025 - Wed 0.30 91 51 7 29.54 0.00 2.92 10.82
Apr 15, 2025 - Tue 0.28 79 55 21 29.34 0.00 4.73 8.29
Apr 14, 2025 - Mon 0.32 90 53 2 23.57 0.00 3.59 12.90
Apr 13, 2025 - Sun 0.30 93 50 1 30.90 0.00 5.05 9.08
Apr 11, 2025 - Fri 0.31 88 49 4 30.35 0.00 6.44 6.43
Data Summary 2.07 93 49 6 182.83 0.00 4.06 10.43  
Detailed Crop Weather Data
Date Average Temp
(f)
Dew Point
(f)
Max Dewpoint
(f)
Min Dewpoint
(f)
Wind Run
(miles/day)
Soil Temp
(f)
Apr 18, 2025 - Fri 74 43 48 35 682 71
Apr 17, 2025 - Thu 75 49 59 39 659 72
Apr 16, 2025 - Wed 72 50 60 41 601 70
Apr 15, 2025 - Tue 68 44 53 37 756 69
Apr 14, 2025 - Mon 72 42 58 26 711 68
Apr 13, 2025 - Sun 74 43 59 26 484 69
Apr 11, 2025 - Fri 73 44 55 31 680 66
Data Summary 72 45 60 26 4,573 69
Heat Units
Date Corn
(heat units)
Cotton
(heat units)
Sorghum
(heat units)
50 Degree
(heat units)
55 Degree
(heat units)
60 Degree
(heat units)
Apr 18, 2025 - Fri 22 12 17 22 17 12
Apr 17, 2025 - Thu 19 12 17 22 17 12
Apr 16, 2025 - Wed 18 11 16 21 16 11
Apr 15, 2025 - Tue 17 7 12 17 12 7
Apr 14, 2025 - Mon 19 12 17 22 17 12
Apr 13, 2025 - Sun 18 11 16 21 16 11
Apr 11, 2025 - Fri 17 8 13 18 13 8
Data Summary 130 73 108 143 108 73
Chilling Hours
Date Method 1
(Hours >= 32 & <= 45 F)
Method 2
(Hours <= 45 F)
Apr 18, 2025 - Fri 0 0
Apr 17, 2025 - Thu 0 0
Apr 16, 2025 - Wed 0 0
Apr 15, 2025 - Tue 0 0
Apr 14, 2025 - Mon 0 0
Apr 13, 2025 - Sun 0 0
Apr 11, 2025 - Fri 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
Nov 141 141
Dec 240 269
Jan 279 471
Feb 196 250
Mar 135 147
Total 991 1278

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