South Monroe is a city of approximately 6,400 people in Michigan, United States. Located in the Eastern Time Zone at 41.9°N latitude.
In 2025, South Monroe recorded an average annual temperature of 50°F — about 1.1°F below the 30-year normal of 52°F. The hottest day reached 97°F in June; the coldest was -9°F in January. Total precipitation was 28 inches (drier than usual). The wettest month was July.
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