Hillsdale Illinois Climate Data

Monthly Average Climate Data for Hillsdale Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.2 °F30.2 °F1.61 in.
February17.8 °F34.7 °F1.79 in.
March28.5 °F47.6 °F2.51 in.
April39.6 °F61.1 °F3.74 in.
May51.4 °F72.4 °F4.81 in.
June61.4 °F81.6 °F4.91 in.
July65.0 °F84.7 °F4.25 in.
August62.8 °F82.8 °F4.08 in.
September54.5 °F76.7 °F3.58 in.
October42.7 °F63.9 °F2.9 in.
November30.9 °F48.6 °F2.32 in.
December20.5 °F35.7 °F2.03 in.
Annual40.8 °F60 °F38.53 in.

Climate Data for Hillsdale Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
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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