Byron is a city of approximately 3,600 people in Illinois, United States. Located in the Central Time Zone at 42.1°N latitude.
In 2025, Byron recorded an average annual temperature of 50°F — about 0.8°F above the 30-year normal of 49°F. The hottest day reached 96°F in June; the coldest was -12°F in February. Total precipitation was 32 inches (drier than usual). Snowfall totaled 9 inches, below the 37-inch average. The wettest month was July.
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