Huntsville's 7 Day Weather Summary Sponsored by Sam Houston State University
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)
Sep 16, 2025 - Tue 0.15 92 66 26 18.90 0.00 0.00 2.77
Sep 15, 2025 - Mon 0.16 91 69 23 18.67 0.00 0.21 2.70
Sep 14, 2025 - Sun 0.14 92 66 25 16.05 0.00 1.11 1.61
Sep 13, 2025 - Sat 0.17 91 66 26 20.03 0.00 0.00 5.47
Sep 12, 2025 - Fri 0.14 91 68 28 16.85 0.00 0.00 2.51
Sep 11, 2025 - Thu 0.15 92 67 27 18.92 0.00 0.00 2.61
Sep 10, 2025 - Wed 0.15 90 59 24 20.83 0.00 0.00 2.58
Data Summary 1.05 92 59 25 130.25 0.00 0.19 2.89  
Detailed Crop Weather Data
Date Average Temp
(f)
Dew Point
(f)
Max Dewpoint
(f)
Min Dewpoint
(f)
Wind Run
(miles/day)
Soil Temp
(f)
Sep 16, 2025 - Tue 79 61 65 58 34 0
Sep 15, 2025 - Mon 80 62 65 60 35 0
Sep 14, 2025 - Sun 79 62 65 58 32 0
Sep 13, 2025 - Sat 80 62 65 59 42 0
Sep 12, 2025 - Fri 80 63 66 61 27 0
Sep 11, 2025 - Thu 80 63 67 59 25 0
Sep 10, 2025 - Wed 75 56 63 50 21 0
Data Summary 79 61 67 50 216 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)
Sep 16, 2025 - Tue 26 19 24 29 24 19
Sep 15, 2025 - Mon 27 20 25 30 25 20
Sep 14, 2025 - Sun 26 19 24 29 24 19
Sep 13, 2025 - Sat 26 18 23 28 23 18
Sep 12, 2025 - Fri 27 20 25 30 25 20
Sep 11, 2025 - Thu 26 20 25 30 25 20
Sep 10, 2025 - Wed 22 15 20 25 20 15
Data Summary 180 131 166 201 166 131
Chilling Hours
Date Method 1
(Hours >= 32 & <= 45 F)
Method 2
(Hours <= 45 F)
Sep 16, 2025 - Tue 0 0
Sep 15, 2025 - Mon 0 0
Sep 14, 2025 - Sun 0 0
Sep 13, 2025 - Sat 0 0
Sep 12, 2025 - Fri 0 0
Sep 11, 2025 - Thu 0 0
Sep 10, 2025 - Wed 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 49 49
Dec 113 115
Jan 230 337
Feb 134 187
Mar 24 24
Total 550 712

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