Glendale Heights Illinois Climate Data

Monthly Average Climate Data for Glendale Heights Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.2 °F31.0 °F2.1 in.
February17.9 °F34.9 °F2.07 in.
March27.3 °F46.6 °F2.29 in.
April37.6 °F59.3 °F3.83 in.
May48.5 °F70.6 °F4.86 in.
June58.5 °F80.5 °F4.54 in.
July63.5 °F84.6 °F3.7 in.
August62.0 °F82.6 °F4.15 in.
September54.0 °F75.8 °F3.38 in.
October42.0 °F62.5 °F3.44 in.
November30.9 °F48.1 °F2.57 in.
December21.1 °F36.1 °F2.24 in.
Annual39.9 °F59.4 °F39.17 in.

Climate Data for Glendale Heights Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 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