Mendota Illinois Climate Data

Monthly Average Climate Data for Mendota Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.1 °C-1 °C44.7 mm
February-8 °C1.5 °C43.43 mm
March-2.6 °C8.4 °C59.94 mm
April3.2 °C15.9 °C91.44 mm
May9.7 °C22.3 °C116.84 mm
June15.2 °C27.2 °C122.94 mm
July17.1 °C28.8 °C106.17 mm
August15.8 °C27.7 °C99.57 mm
September11.3 °C24.7 °C88.39 mm
October4.9 °C17.6 °C75.69 mm
November-1.1 °C9.1 °C61.47 mm
December-6.8 °C1.9 °C49.53 mm
Annual4.1 °C15.3 °C960.11 mm

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 : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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