Winnebago Illinois Climate Data

Monthly Average Climate Data for Winnebago Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.1 °C-2.2 °C40.64 mm
February-9.2 °C0.1 °C42.16 mm
March-3.4 °C6.9 °C54.86 mm
April2.5 °C14.5 °C94.23 mm
May9.1 °C20.9 °C113.79 mm
June14.7 °C26.1 °C135.89 mm
July16.6 °C27.8 °C104.39 mm
August15.6 °C27 °C104.9 mm
September10.8 °C23.6 °C88.14 mm
October4.4 °C16.4 °C73.41 mm
November-1.7 °C7.9 °C55.63 mm
December-7.4 °C0.9 °C49.28 mm
Annual3.4 °C14.2 °C957.32 mm

Climate Data for Winnebago 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 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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