Hillsdale Illinois Climate Data

Monthly Average Climate Data for Hillsdale Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.9 °C-1 °C40.89 mm
February-7.9 °C1.5 °C45.47 mm
March-1.9 °C8.7 °C63.75 mm
April4.2 °C16.2 °C95 mm
May10.8 °C22.4 °C122.17 mm
June16.3 °C27.6 °C124.71 mm
July18.3 °C29.3 °C107.95 mm
August17.1 °C28.2 °C103.63 mm
September12.5 °C24.8 °C90.93 mm
October5.9 °C17.7 °C73.66 mm
November-0.6 °C9.2 °C58.93 mm
December-6.4 °C2.1 °C51.56 mm
Annual4.9 °C15.6 °C978.65 mm

Climate Data for Hillsdale 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 : -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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