Prophetstown Illinois Climate Data

Monthly Average Climate Data for Prophetstown Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.2 °F29.7 °F1.68 in.
February17.1 °F34.2 °F1.77 in.
March27.8 °F46.9 °F2.66 in.
April38.6 °F60.5 °F3.76 in.
May50.5 °F71.9 °F4.88 in.
June60.4 °F81.1 °F5.1 in.
July63.8 °F84.3 °F4.08 in.
August61.6 °F82.5 °F4.23 in.
September53.1 °F76.3 °F3.52 in.
October41.6 °F63.4 °F3.05 in.
November30.0 °F48.0 °F2.15 in.
December19.8 °F35.2 °F2.03 in.
Annual39.8 °F59.5 °F38.91 in.

Climate Data for Prophetstown 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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