With a population of around 5,700, Wilmington sits in Illinois, United States. The city operates in the Central Time Zone.
In 2025, Wilmington recorded an average annual temperature of 52°F. The hottest temperatures reached 93°F in June; the coolest were -8°F in January. Total precipitation for the year was 34 inches, with the wettest month being July. Snowfall for the year totaled approximately 9 inches.
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