Flat Rock is a city of approximately 9,900 people in Michigan, United States. Located in the Eastern Time Zone at 42.1°N latitude.
In 2025, Flat Rock recorded an average annual temperature of 50°F — right at the 30-year normal of 51°F. The hottest day reached 98°F in June; the coldest was -9°F in January. Total precipitation was 32 inches (drier than usual). Snowfall totaled 11 inches, below the 45-inch average. The wettest month was July.
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