Bannockburn Illinois Climate Data

Monthly Average Climate Data for Bannockburn Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.1 °F31.0 °F2.21 in.
February19.8 °F34.8 °F2.04 in.
March28.6 °F44.9 °F2.27 in.
April38.7 °F56.4 °F3.87 in.
May49.5 °F68.2 °F4.49 in.
June59.5 °F78.4 °F4.37 in.
July65.2 °F83.0 °F3.79 in.
August64.2 °F81.3 °F3.92 in.
September56.5 °F74.6 °F3.68 in.
October44.5 °F62.1 °F3.35 in.
November33.0 °F47.8 °F2.51 in.
December23.1 °F36.4 °F2.13 in.
Annual41.6 °F58.2 °F38.63 in.

Climate Data for Bannockburn Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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