Chicago Heights Illinois Climate Data

Monthly Average Climate Data for Chicago Heights Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F31.9 °F2.27 in.
February19.7 °F35.8 °F2.15 in.
March29.0 °F46.8 °F2.39 in.
April39.2 °F59.3 °F3.91 in.
May50.1 °F70.0 °F4.46 in.
June60.1 °F79.9 °F4.71 in.
July64.7 °F83.9 °F4.43 in.
August63.0 °F82.0 °F4.15 in.
September55.4 °F75.9 °F3.27 in.
October43.3 °F63.1 °F3.51 in.
November32.6 °F49.1 °F2.78 in.
December22.6 °F37.0 °F2.3 in.
Annual41.4 °F59.6 °F40.33 in.

Climate Data for Chicago Heights Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation