Bonnie Illinois Climate Data

Monthly Average Climate Data for Bonnie Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.3 °F39.7 °F3.16 in.
February26.3 °F44.6 °F2.75 in.
March34.9 °F54.8 °F3.93 in.
April45.2 °F66.6 °F5.0 in.
May55.8 °F75.7 °F5.28 in.
June64.3 °F84.7 °F4.74 in.
July67.7 °F87.7 °F4.18 in.
August65.4 °F86.9 °F3.1 in.
September57.4 °F80.7 °F3.14 in.
October45.7 °F69.2 °F3.3 in.
November35.6 °F55.1 °F4.08 in.
December27.6 °F43.9 °F3.1 in.
Annual45.8 °F65.8 °F45.76 in.

Climate Data for Bonnie Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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