Prospect Heights Illinois Climate Data

Monthly Average Climate Data for Prospect Heights Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.8 °C-0.5 °C51.56 mm
February-7.3 °C1.7 °C49.53 mm
March-2.1 °C7.7 °C57.4 mm
April3.6 °C14.3 °C95.25 mm
May9.6 °C20.7 °C114.81 mm
June15.2 °C26.3 °C111.51 mm
July18.2 °C28.7 °C92.46 mm
August17.4 °C27.7 °C101.85 mm
September12.9 °C23.9 °C83.06 mm
October6.3 °C16.8 °C81.79 mm
November0 °C8.9 °C61.21 mm
December-5.4 °C2.4 °C54.1 mm
Annual5 °C14.9 °C954.53 mm

Climate Data for Prospect Heights 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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