Highland Park Illinois Climate Data

Monthly Average Climate Data for Highland Park Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.7 °C-0.3 °C53.34 mm
February-6.2 °C1.7 °C50.8 mm
March-1.3 °C7.1 °C56.13 mm
April4.2 °C13.3 °C97.54 mm
May9.9 °C19.8 °C117.35 mm
June15.6 °C25.5 °C108.2 mm
July19.1 °C28.2 °C95 mm
August18.8 °C27.3 °C102.62 mm
September14.4 °C23.6 °C91.19 mm
October7.8 °C16.7 °C87.88 mm
November1.3 °C8.9 °C66.29 mm
December-4.3 °C2.6 °C56.13 mm
Annual6 °C14.5 °C982.47 mm

Climate Data for Highland Park 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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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