London Mills Illinois Climate Data

Monthly Average Climate Data for London Mills Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.5 °F32.5 °F1.9 in.
February19.0 °F37.2 °F1.89 in.
March29.2 °F50.0 °F2.47 in.
April39.6 °F63.2 °F3.74 in.
May51.7 °F73.6 °F5.04 in.
June61.4 °F82.4 °F4.67 in.
July64.3 °F85.6 °F4.09 in.
August61.9 °F84.0 °F3.58 in.
September53.8 °F78.2 °F3.68 in.
October41.6 °F65.7 °F2.93 in.
November30.7 °F50.5 °F2.4 in.
December21.4 °F37.9 °F1.91 in.
Annual40.8 °F61.7 °F38.3 in.

Climate Data for London Mills Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°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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