Mackinaw, in Illinois, United States, is home to roughly 1,900 people in the Central Time Zone at 40.5°N latitude.
In 2025, Mackinaw recorded an average annual temperature of 53°F — right at the 30-year normal of 53°F. The hottest day reached 92°F in July; the coldest was -7°F in January. Total precipitation was 31 inches (drier than usual). Snowfall totaled 8 inches, below the 26-inch average. The wettest month was June.
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