South Texas Weather

Heat Units Calculator

Crop Heat Units are calculated on a daily basis, using the maximum (Tmax) and minimum (Tmin) daily air temperatures, measured from midnight to midnight. The Crop Heat Unit (CHU) system is used to assist farmers in selecting the most suitable hybrids and varieties for their area.

Select a crop:
Base Temperature:   Peak Temperature: Must be in Fahrenheit

Select a Station:

Begin Calculation from:mm/dd/yyyy
End Calculation on: mm/dd/yyyy


This site is run by the Texas A&M AgriLife Research Center District 12 Office. Our aim is to provide the public with weather data recorded from our weather stations placed around the Rio Grande Valley.

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Texas A&M AgriLife
Research | 2415 E Hwy 83 | Weslaco, TX 78596
Phone: (956)968-5585 | Fax: (956)969-5620