Knoxville Illinois Climate Data

Monthly Average Climate Data for Knoxville Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.8 °C-0.6 °C46.48 mm
February-7.9 °C1.9 °C51.05 mm
March-2.1 °C9.2 °C62.99 mm
April3.8 °C16.4 °C99.57 mm
May10.6 °C22.3 °C133.35 mm
June16 °C27.3 °C121.16 mm
July17.9 °C28.9 °C102.11 mm
August16.7 °C28.1 °C93.73 mm
September12 °C24.8 °C99.57 mm
October5.5 °C17.8 °C74.68 mm
November-0.9 °C9.4 °C63.75 mm
December-6.5 °C2.4 °C52.32 mm
Annual4.6 °C15.7 °C1000.76 mm

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