With a population of around 5,800, Lake Mills sits in Wisconsin, United States. The city operates in the Central Time Zone.
In 2025, Lake Mills recorded an average annual temperature of 48°F — about 0.9°F above the 30-year normal of 47°F. The hottest day reached 93°F in June; the coldest was -13°F in February. Total precipitation was 30 inches (drier than usual). Snowfall totaled 10 inches, below the 52-inch average. The wettest month was June.
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