Bourbonnais Illinois Climate Data

Monthly Average Climate Data for Bourbonnais Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.2 °F32.0 °F2.21 in.
February19.4 °F36.4 °F1.89 in.
March28.7 °F48.0 °F2.39 in.
April38.9 °F61.1 °F3.77 in.
May50.3 °F72.3 °F4.52 in.
June60.2 °F81.4 °F4.76 in.
July63.9 °F84.4 °F4.5 in.
August61.8 °F82.9 °F3.83 in.
September53.8 °F77.5 °F3.18 in.
October42.2 °F64.6 °F3.33 in.
November31.7 °F49.8 °F2.66 in.
December22.0 °F37.3 °F2.2 in.
Annual40.8 °F60.6 °F39.24 in.

Climate Data for Bourbonnais Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation