Mendota Illinois Climate Data

Monthly Average Climate Data for Mendota Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.8 °F30.2 °F1.76 in.
February17.6 °F34.7 °F1.71 in.
March27.3 °F47.2 °F2.36 in.
April37.7 °F60.7 °F3.6 in.
May49.5 °F72.1 °F4.6 in.
June59.4 °F80.9 °F4.84 in.
July62.7 °F83.8 °F4.18 in.
August60.5 °F81.9 °F3.92 in.
September52.4 °F76.4 °F3.48 in.
October40.8 °F63.7 °F2.98 in.
November30.0 °F48.4 °F2.42 in.
December19.8 °F35.5 °F1.95 in.
Annual39.3 °F59.6 °F37.8 in.

Climate Data for Mendota 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 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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