Gilman Illinois Climate Data

Monthly Average Climate Data for Gilman Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.1 °F32.3 °F2.24 in.
February19.3 °F36.9 °F1.93 in.
March28.8 °F49.0 °F2.58 in.
April38.9 °F62.5 °F3.81 in.
May50.5 °F73.5 °F4.49 in.
June60.3 °F82.2 °F4.63 in.
July63.6 °F84.8 °F4.44 in.
August61.3 °F83.2 °F3.63 in.
September53.2 °F78.5 °F3.06 in.
October42.0 °F65.7 °F3.3 in.
November31.4 °F50.1 °F2.75 in.
December21.8 °F37.4 °F2.15 in.
Annual40.6 °F61.3 °F39.01 in.

Climate Data for Gilman 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
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