Mark Illinois Climate Data

Monthly Average Climate Data for Mark Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.9 °F31.1 °F1.76 in.
February18.5 °F35.6 °F1.77 in.
March28.2 °F48.0 °F2.42 in.
April39.0 °F61.7 °F3.42 in.
May50.7 °F72.6 °F4.46 in.
June60.5 °F81.3 °F4.35 in.
July64.0 °F84.4 °F3.86 in.
August61.8 °F82.6 °F3.9 in.
September53.5 °F77.0 °F3.46 in.
October42.0 °F64.6 °F2.9 in.
November30.8 °F49.2 °F2.43 in.
December20.8 °F36.3 °F1.94 in.
Annual40.4 °F60.4 °F36.67 in.

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