Saint Clair, in Michigan, United States, is home to roughly 5,500 people in the Eastern Time Zone at 42.8°N latitude.
In 2025, Saint Clair recorded an average annual temperature of 48°F — about 0.6°F below the 30-year normal of 49°F. The hottest day reached 94°F in June; the coldest was -7°F in January. Total precipitation was 33 inches (near normal). Snowfall totaled 15 inches, below the 32-inch average. The wettest month was July.
View current conditions and forecast for Saint Clair · More cities in Michigan