With a population of around 5,700, Wilmington sits in Illinois, United States. The city operates in the Central Time Zone.
Recent weather here gives a sense of typical conditions: in 2025, Wilmington recorded a mean annual temperature of 52°F, ranging from -8°F lows in January to 93°F highs in June, with about 34 inches of precipitation across the year.
View historical weather for Wilmington · More cities in Illinois