With a population of around 1,100, Bull Valley sits in Illinois, United States. The city operates in the Central Time Zone.
In 2025, Bull Valley recorded an average annual temperature of 49°F — about 0.8°F above the 30-year normal of 48°F. The hottest day reached 93°F in June; the coldest was -11°F in February. Total precipitation was 33 inches (drier than usual). The wettest month was July.
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