Milledgeville Illinois Climate Data

Monthly Average Climate Data for Milledgeville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.3 °F29.2 °F1.68 in.
February16.0 °F33.6 °F1.86 in.
March26.5 °F46.0 °F2.37 in.
April37.1 °F60.0 °F3.8 in.
May49.0 °F71.5 °F4.82 in.
June58.9 °F80.6 °F5.15 in.
July62.1 °F83.5 °F4.42 in.
August59.9 °F82.0 °F4.08 in.
September51.5 °F76.1 °F3.64 in.
October40.1 °F63.1 °F2.78 in.
November29.0 °F47.5 °F2.25 in.
December18.7 °F34.6 °F2.0 in.
Annual38.4 °F59 °F38.85 in.

Climate Data for Milledgeville Illinois

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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