Arlington Heights Illinois Climate Data

Monthly Average Climate Data for Arlington Heights Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.8 °F30.9 °F2.01 in.
February18.6 °F34.9 °F1.95 in.
March27.9 °F45.9 °F2.26 in.
April38.1 °F57.9 °F3.75 in.
May49.0 °F69.3 °F4.54 in.
June59.0 °F79.5 °F4.42 in.
July64.3 °F83.9 °F3.67 in.
August62.9 °F81.9 °F4.04 in.
September54.8 °F75.1 °F3.26 in.
October42.9 °F62.2 °F3.22 in.
November31.6 °F48.0 °F2.4 in.
December21.8 °F36.2 °F2.14 in.
Annual40.6 °F58.8 °F37.66 in.

Climate Data for Arlington 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 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