Mackinaw Illinois Climate Data

Monthly Average Climate Data for Mackinaw Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.3 °F33.1 °F2.22 in.
February19.7 °F37.9 °F1.95 in.
March29.4 °F50.1 °F2.58 in.
April40.1 °F63.2 °F3.81 in.
May51.5 °F73.7 °F4.7 in.
June61.1 °F82.4 °F4.27 in.
July64.3 °F85.6 °F3.97 in.
August62.1 °F84.1 °F3.63 in.
September54.1 °F79.3 °F3.3 in.
October42.5 °F66.1 °F3.11 in.
November31.4 °F51.0 °F2.95 in.
December22.0 °F38.3 °F2.26 in.
Annual41.2 °F62.1 °F38.75 in.

Climate Data for Mackinaw Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost125-150 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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