South Wilmington is located in Illinois. South Wilmington, Illinois has a population of 831. South Wilmington is less family-centric than the surrounding county with 33.05% of the households containing married families with children. The county average for households married with children is 36.37%.
The median household income in South Wilmington, Illinois is $65,313. The median household income for the surrounding county is $71,598 compared to the national median of $57,652. The median age of people living in South Wilmington is 38.2 years.
The average high temperature in July is 84.1 degrees, with an average low temperature in January of 14.8 degrees. The average rainfall is approximately 37.7 inches per year, with 22.2 inches of snow per year.
