About Fulton, IL's Climate & Weather History

With a population of around 3,400, Fulton sits in Illinois, United States. The city operates in the Central Time Zone.

In 2025, Fulton recorded an average annual temperature of 51°F — about 1.2°F above the 30-year normal of 50°F. The hottest day reached 93°F in June; the coldest was -12°F in January. Total precipitation was 31 inches (drier than usual). The wettest month was July.