Granville Illinois Climate Data

Monthly Average Climate Data for Granville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.1 °F31.2 °F1.78 in.
February18.6 °F35.7 °F1.77 in.
March28.4 °F48.1 °F2.42 in.
April39.0 °F61.6 °F3.45 in.
May50.8 °F72.6 °F4.51 in.
June60.7 °F81.3 °F4.34 in.
July64.1 °F84.4 °F3.85 in.
August61.9 °F82.6 °F3.83 in.
September53.7 °F77.0 °F3.44 in.
October42.2 °F64.6 °F2.92 in.
November31.0 °F49.3 °F2.45 in.
December20.9 °F36.4 °F1.95 in.
Annual40.5 °F60.4 °F36.71 in.

Climate Data for Granville Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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