Oak Forest Illinois Climate Data

Monthly Average Climate Data for Oak Forest Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.3 °C0 °C55.88 mm
February-6.7 °C2.2 °C52.83 mm
March-1.6 °C8.4 °C60.96 mm
April4.2 °C15.3 °C99.82 mm
May10.2 °C21.4 °C116.84 mm
June15.7 °C26.9 °C113.54 mm
July18.3 °C29.1 °C112.27 mm
August17.4 °C28.1 °C105.92 mm
September13.3 °C24.6 °C82.3 mm
October6.5 °C17.4 °C87.88 mm
November0.4 °C9.6 °C67.31 mm
December-5.1 °C2.8 °C57.66 mm
Annual5.4 °C15.5 °C1013.21 mm

Climate Data for Oak Forest 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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