Grand Ridge Illinois Climate Data

Monthly Average Climate Data for Grand Ridge Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.7 °F31.5 °F1.96 in.
February19.1 °F35.9 °F1.82 in.
March28.6 °F48.3 °F2.5 in.
April39.1 °F61.5 °F3.56 in.
May50.9 °F72.5 °F4.64 in.
June60.6 °F81.4 °F4.53 in.
July64.1 °F84.3 °F3.91 in.
August61.9 °F82.4 °F3.8 in.
September53.9 °F77.2 °F3.4 in.
October42.2 °F64.6 °F3.07 in.
November31.2 °F49.4 °F2.63 in.
December21.3 °F36.7 °F2.08 in.
Annual40.7 °F60.5 °F37.9 in.

Climate Data for Grand Ridge Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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