Illinois Climate Network: Crop Degree-Day Calculator, Illinois State Water Survey

Water and Atmospheric Resources Monitoring Program (WARM)

Weather Soil Groundwater Sediment Streamflow Reservoirs

Illinois Climate Network: Crop Degree-Day Calculator

Choose a base temperature corresponding to a particular crop, 50° F for corn and 40° F for colder crops. Next, select a station nearest your point of interest, and input a planting date. Click "CALCULATE" to see the relevant degree-day accumulation for your area.

Click the nearest station (dot).
Illinois Map
Choose a Base Temperature (Crop)

bullet 50° (Corn)
bullet 40° (Cold Weather Crops)

Input a planting date (mm/dd):


For regional growing degree day maps, visit the Midwest Climate Watch.

Illinois State Water Survey

2204 Griffith Dr
Champaign, IL 61820-7463

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