Bonnie Illinois Climate Data

Monthly Average Climate Data for Bonnie Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.8 °C4.3 °C80.26 mm
February-3.2 °C7 °C69.85 mm
March1.6 °C12.7 °C99.82 mm
April7.3 °C19.2 °C127 mm
May13.2 °C24.3 °C134.11 mm
June17.9 °C29.3 °C120.4 mm
July19.8 °C30.9 °C106.17 mm
August18.6 °C30.5 °C78.74 mm
September14.1 °C27.1 °C79.76 mm
October7.6 °C20.7 °C83.82 mm
November2 °C12.8 °C103.63 mm
December-2.4 °C6.6 °C78.74 mm
Annual7.6 °C18.8 °C1162.3 mm

Climate Data for Bonnie Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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