Grant Park Illinois Climate Data

Monthly Average Climate Data for Grant Park Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.6 °C-0.1 °C57.15 mm
February-7.1 °C2.3 °C49.78 mm
March-1.9 °C8.6 °C59.94 mm
April3.8 °C15.7 °C93.73 mm
May10 °C21.8 °C111.25 mm
June15.4 °C27 °C120.14 mm
July17.5 °C28.7 °C116.33 mm
August16.4 °C27.9 °C103.89 mm
September11.9 °C24.8 °C87.12 mm
October5.6 °C17.8 °C86.61 mm
November-0.1 °C9.6 °C68.58 mm
December-5.4 °C2.8 °C54.86 mm
Annual4.8 °C15.6 °C1009.38 mm

Climate Data for Grant Park Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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