Berwyn Illinois Climate Data

Monthly Average Climate Data for Berwyn Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.7 °C-0.1 °C55.12 mm
February-6.2 °C2 °C52.58 mm
March-1.2 °C7.9 °C59.69 mm
April4.6 °C14.8 °C100.84 mm
May10.7 °C21.1 °C119.63 mm
June16.3 °C26.6 °C110.24 mm
July19.3 °C29.1 °C109.22 mm
August18.6 °C28 °C104.39 mm
September14.4 °C24.4 °C82.8 mm
October7.6 °C17.3 °C87.12 mm
November1.1 °C9.4 °C64.77 mm
December-4.6 °C2.9 °C58.93 mm
Annual6.1 °C15.3 °C1005.33 mm

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 : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation