Geneseo Illinois Climate Data

Monthly Average Climate Data for Geneseo Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.3 °F30.3 °F1.7 in.
February17.9 °F34.8 °F1.86 in.
March28.4 °F47.8 °F2.48 in.
April39.4 °F61.3 °F3.77 in.
May51.3 °F72.5 °F4.9 in.
June61.3 °F81.8 °F4.55 in.
July64.8 °F84.8 °F4.27 in.
August62.7 °F82.9 °F4.13 in.
September54.3 °F76.8 °F3.57 in.
October42.6 °F63.9 °F3.05 in.
November30.8 °F48.8 °F2.55 in.
December20.4 °F35.8 °F2.08 in.
Annual40.7 °F60.1 °F38.91 in.

Climate Data for Geneseo 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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