Milan Illinois Climate Data

Monthly Average Climate Data for Milan Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.0 °F30.9 °F1.53 in.
February18.6 °F35.4 °F1.73 in.
March29.2 °F48.3 °F2.49 in.
April40.4 °F61.5 °F3.66 in.
May52.2 °F72.7 °F4.83 in.
June62.2 °F82.0 °F4.8 in.
July65.9 °F85.1 °F4.2 in.
August63.8 °F83.2 °F4.0 in.
September55.5 °F77.3 °F3.46 in.
October43.7 °F64.5 °F2.86 in.
November31.6 °F49.3 °F2.3 in.
December21.1 °F36.3 °F1.99 in.
Annual41.6 °F60.5 °F37.85 in.

Climate Data for Milan 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 : -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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