Thomson Illinois Climate Data

Monthly Average Climate Data for Thomson Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.7 °C-1.5 °C39.37 mm
February-8.7 °C1.1 °C43.69 mm
March-2.6 °C8 °C61.72 mm
April3.4 °C15.4 °C91.95 mm
May9.9 °C21.9 °C113.79 mm
June15.5 °C27.1 °C130.3 mm
July17.4 °C28.9 °C106.43 mm
August16.2 °C27.8 °C98.3 mm
September11.4 °C24.4 °C92.71 mm
October5.1 °C17.1 °C69.85 mm
November-1.3 °C8.7 °C57.66 mm
December-7 °C1.6 °C48.26 mm
Annual4.1 °C15 °C954.03 mm

Climate Data for Thomson 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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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