Lee Illinois Climate Data

Monthly Average Climate Data for Lee Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.2 °F28.2 °F1.6 in.
February15.8 °F32.6 °F1.65 in.
March25.9 °F45.1 °F2.17 in.
April36.3 °F58.7 °F3.5 in.
May48.3 °F70.3 °F4.84 in.
June58.2 °F79.5 °F4.73 in.
July61.7 °F82.4 °F3.96 in.
August59.3 °F80.4 °F3.82 in.
September51.0 °F74.8 °F3.46 in.
October39.3 °F61.9 °F2.88 in.
November28.8 °F46.7 °F2.27 in.
December18.4 °F33.8 °F1.82 in.
Annual37.9 °F57.9 °F36.7 in.

Climate Data for Lee 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 : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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