With a population of around 5,200, Chelsea sits in Michigan, United States. The city operates in the Eastern Time Zone.
In 2025, Chelsea recorded an average annual temperature of 49°F — about 1.2°F above the 30-year normal of 48°F. The hottest day reached 94°F in July; the coldest was -9°F in January. Total precipitation was 33 inches (wetter than usual). The wettest month was June.
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