Mill Creek Illinois Climate Data

Monthly Average Climate Data for Mill Creek Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January25.3 °F42.4 °F3.67 in.
February28.7 °F47.7 °F3.47 in.
March36.8 °F57.4 °F4.67 in.
April46.7 °F68.6 °F5.42 in.
May56.9 °F77.4 °F5.44 in.
June65.5 °F85.9 °F4.47 in.
July69.0 °F88.8 °F3.87 in.
August66.5 °F87.7 °F3.03 in.
September58.5 °F81.9 °F3.4 in.
October46.7 °F71.2 °F3.82 in.
November36.8 °F57.3 °F4.52 in.
December29.2 °F46.1 °F4.03 in.
Annual47.2 °F67.7 °F49.81 in.

Climate Data for Mill Creek Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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