Winfield Illinois Climate Data

Monthly Average Climate Data for Winfield Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.4 °C-0.6 °C52.58 mm
February-7.9 °C1.6 °C50.8 mm
March-2.6 °C8.1 °C59.69 mm
April3.1 °C15.3 °C98.55 mm
May9.2 °C21.6 °C124.46 mm
June14.7 °C27 °C114.3 mm
July17.3 °C29.2 °C96.77 mm
August16.4 °C28 °C103.38 mm
September12.1 °C24.4 °C84.58 mm
October5.3 °C17.2 °C89.41 mm
November-0.8 °C9 °C65.53 mm
December-6.2 °C2.2 °C56.64 mm
Annual4.3 °C15.3 °C996.69 mm

Climate Data for Winfield Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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