South Beloit, in Illinois, United States, is home to roughly 7,700 people in the Central Time Zone at 42.5°N latitude.
In 2025, South Beloit recorded an average annual temperature of 49°F — right at the 30-year normal of 49°F. The hottest day reached 94°F in June; the coldest was -12°F in February. Total precipitation was 30 inches (drier than usual). Snowfall totaled 10 inches, below the 37-inch average. The wettest month was July.
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