Osco Illinois Climate Data

Monthly Average Climate Data for Osco Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.9 °F30.0 °F1.64 in.
February17.4 °F34.5 °F1.85 in.
March28.0 °F47.8 °F2.44 in.
April38.9 °F61.1 °F3.77 in.
May50.9 °F72.2 °F4.92 in.
June60.9 °F81.0 °F4.77 in.
July64.4 °F84.0 °F4.13 in.
August62.2 °F82.2 °F3.9 in.
September53.9 °F76.5 °F3.63 in.
October42.2 °F63.6 °F2.92 in.
November30.3 °F48.5 °F2.39 in.
December20.0 °F35.5 °F2.05 in.
Annual40.3 °F59.7 °F38.41 in.

Climate Data for Osco Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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