Hillside Illinois Climate Data

Monthly Average Climate Data for Hillside Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.9 °F31.7 °F2.16 in.
February19.6 °F35.5 °F2.15 in.
March28.9 °F46.5 °F2.34 in.
April39.2 °F59.0 °F3.95 in.
May50.1 °F70.2 °F4.72 in.
June60.2 °F80.3 °F4.42 in.
July65.4 °F84.6 °F3.88 in.
August63.9 °F82.6 °F4.16 in.
September55.9 °F76.0 °F3.36 in.
October43.7 °F63.0 °F3.47 in.
November32.4 °F48.8 °F2.58 in.
December22.7 °F36.9 °F2.29 in.
Annual41.6 °F59.6 °F39.48 in.

Climate Data for Hillside Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°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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