Old Mill Creek Illinois Climate Data

Monthly Average Climate Data for Old Mill Creek Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.5 °F29.4 °F1.98 in.
February17.3 °F33.0 °F2.0 in.
March26.5 °F43.6 °F2.29 in.
April36.8 °F56.2 °F3.93 in.
May47.4 °F67.7 °F4.34 in.
June57.6 °F77.5 °F4.48 in.
July62.7 °F82.1 °F3.69 in.
August61.4 °F80.5 °F3.61 in.
September53.7 °F73.7 °F3.58 in.
October42.1 °F60.8 °F3.19 in.
November31.0 °F46.9 °F2.44 in.
December20.7 °F34.9 °F2.19 in.
Annual39.3 °F57.2 °F37.72 in.

Climate Data for Old Mill Creek Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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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