Berwyn Illinois Climate Data

Monthly Average Climate Data for Berwyn Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.1 °F31.9 °F2.17 in.
February20.8 °F35.6 °F2.07 in.
March29.9 °F46.3 °F2.35 in.
April40.2 °F58.7 °F3.97 in.
May51.2 °F69.9 °F4.71 in.
June61.4 °F79.9 °F4.34 in.
July66.7 °F84.3 °F4.3 in.
August65.5 °F82.4 °F4.11 in.
September58.0 °F76.0 °F3.26 in.
October45.6 °F63.2 °F3.43 in.
November34.0 °F48.9 °F2.55 in.
December23.8 °F37.2 °F2.32 in.
Annual42.9 °F59.5 °F39.58 in.

Climate Data for Berwyn Illinois

Average First Frost DateOct. 21 - Oct. 31
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 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation