Wilmette Illinois Climate Data

Monthly Average Climate Data for Wilmette Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.2 °C0 °C56.9 mm
February-5.6 °C2.1 °C54.61 mm
March-0.8 °C7.4 °C56.13 mm
April4.6 °C13.8 °C97.54 mm
May10.3 °C19.9 °C116.59 mm
June15.9 °C25.4 °C111.25 mm
July19.7 °C28 °C96.01 mm
August19.4 °C27.2 °C104.65 mm
September15.3 °C23.6 °C90.68 mm
October8.3 °C17 °C89.66 mm
November1.8 °C9.2 °C67.31 mm
December-3.8 °C2.9 °C59.18 mm
Annual6.5 °C14.7 °C1000.51 mm

Climate Data for Wilmette 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 5b : -26.1°C to -23.3°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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