Prophetstown Illinois Climate Data

Monthly Average Climate Data for Prophetstown Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.4 °C-1.3 °C42.67 mm
February-8.3 °C1.2 °C44.96 mm
March-2.3 °C8.3 °C67.56 mm
April3.7 °C15.8 °C95.5 mm
May10.3 °C22.2 °C123.95 mm
June15.8 °C27.3 °C129.54 mm
July17.7 °C29.1 °C103.63 mm
August16.4 °C28.1 °C107.44 mm
September11.7 °C24.6 °C89.41 mm
October5.3 °C17.4 °C77.47 mm
November-1.1 °C8.9 °C54.61 mm
December-6.8 °C1.8 °C51.56 mm
Annual4.3 °C15.3 °C988.3 mm

Climate Data for Prophetstown 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 : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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