La Grange Illinois Climate Data

Monthly Average Climate Data for La Grange Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.4 °F31.9 °F2.19 in.
February20.1 °F35.7 °F2.1 in.
March29.4 °F46.9 °F2.38 in.
April39.9 °F59.6 °F3.98 in.
May50.8 °F70.8 °F4.8 in.
June60.9 °F80.8 °F4.4 in.
July65.9 °F85.3 °F4.13 in.
August64.4 °F83.2 °F4.17 in.
September56.6 °F76.7 °F3.26 in.
October44.2 °F63.5 °F3.48 in.
November33.1 °F49.2 °F2.54 in.
December23.0 °F37.2 °F2.32 in.
Annual42.1 °F60.1 °F39.75 in.

Climate Data for La Grange Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation