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

Prairie Research Institute State Scientific Surveys

• Illinois Natural History Survey
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• Illinois State Archaeological Survey
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• Illinois State Geological Survey
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• Illinois State Water Survey
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• Illinois Sustainable Technology Center

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).

Choose a Base Temperature (Crop)

50° (Corn)
40° (Cold Weather Crops)

Input a planting date (mm/dd):

CALCULATE  Clear

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