With a population of around 1,200, Andalusia sits in Illinois, United States. The city operates in the Central Time Zone.
In 2025, Andalusia recorded an average annual temperature of 52°F — about 2.2°F above the 30-year normal of 50°F. The hottest day reached 96°F in June; the coldest was -11°F in January. Total precipitation was 30 inches (drier than usual). The wettest month was July.
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