Clarendon Hills Illinois Climate Data

Monthly Average Climate Data for Clarendon Hills Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.0 °F31.8 °F2.21 in.
February18.7 °F35.8 °F2.14 in.
March28.1 °F47.6 °F2.38 in.
April38.5 °F60.2 °F3.99 in.
May49.4 °F71.4 °F4.81 in.
June59.5 °F81.3 °F4.5 in.
July64.3 °F85.5 °F4.02 in.
August62.7 °F83.4 °F4.2 in.
September54.9 °F77.0 °F3.35 in.
October42.6 °F63.6 °F3.57 in.
November31.6 °F48.8 °F2.59 in.
December21.7 °F36.6 °F2.3 in.
Annual40.7 °F60.3 °F40.06 in.

Climate Data for Clarendon Hills 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
2024 plantmaps.com