Montgomery Illinois Climate Data

Monthly Average Climate Data for Montgomery Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.2 °F31.0 °F1.93 in.
February18.1 °F35.0 °F1.9 in.
March27.8 °F47.0 °F2.38 in.
April38.3 °F60.0 °F3.88 in.
May49.5 °F71.2 °F4.82 in.
June59.5 °F80.7 °F4.49 in.
July63.5 °F84.2 °F3.86 in.
August61.7 °F82.4 °F3.91 in.
September54.0 °F76.5 °F3.29 in.
October41.8 °F63.5 °F3.47 in.
November31.0 °F48.8 °F2.56 in.
December21.3 °F36.3 °F2.17 in.
Annual40.1 °F59.7 °F38.66 in.

Climate Data for Montgomery Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation