Mundelein Illinois Climate Data

Monthly Average Climate Data for Mundelein Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.3 °C-0.9 °C49.02 mm
February-7.8 °C1.1 °C50.04 mm
March-2.7 °C7.2 °C59.18 mm
April3.1 °C14.1 °C98.3 mm
May8.9 °C20.3 °C114.3 mm
June14.6 °C25.9 °C114.05 mm
July17.6 °C28.3 °C97.03 mm
August16.8 °C27.3 °C96.27 mm
September12.4 °C23.6 °C88.14 mm
October5.9 °C16.5 °C82.3 mm
November-0.4 °C8.6 °C61.72 mm
December-5.9 °C2.1 °C53.59 mm
Annual4.4 °C14.5 °C963.94 mm

Climate Data for Mundelein Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation