Glenwood Illinois Climate Data

Monthly Average Climate Data for Glenwood Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.2 °F32.0 °F2.23 in.
February19.9 °F35.8 °F2.16 in.
March29.1 °F46.7 °F2.38 in.
April39.3 °F59.3 °F3.92 in.
May50.3 °F70.0 °F4.44 in.
June60.3 °F79.9 °F4.72 in.
July65.0 °F83.8 °F4.35 in.
August63.2 °F82.1 °F4.14 in.
September55.6 °F75.9 °F3.27 in.
October43.6 °F63.2 °F3.5 in.
November32.9 °F49.3 °F2.77 in.
December22.9 °F37.2 °F2.31 in.
Annual41.6 °F59.6 °F40.19 in.

Climate Data for Glenwood 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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