Winslow Illinois Climate Data

Monthly Average Climate Data for Winslow Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.1 °F28.4 °F1.32 in.
February14.6 °F32.7 °F1.49 in.
March25.3 °F45.1 °F1.94 in.
April36.0 °F58.9 °F3.66 in.
May47.7 °F70.5 °F4.1 in.
June57.8 °F80.0 °F5.59 in.
July61.3 °F83.0 °F4.31 in.
August59.0 °F81.4 °F3.99 in.
September50.5 °F74.8 °F3.82 in.
October39.2 °F62.0 °F2.96 in.
November28.2 °F46.6 °F2.21 in.
December17.7 °F33.8 °F1.68 in.
Annual37.4 °F58.1 °F37.07 in.

Climate Data for Winslow Illinois

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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