Sumner is located in Illinois. Sumner, Illinois has a population of 2,851. Sumner is more family-centric than the surrounding county with 34.73% of the households containing married families with children. The county average for households married with children is 30.24%.
The median household income in Sumner, Illinois is $39,554. The median household income for the surrounding county is $52,020 compared to the national median of $69,021. The median age of people living in Sumner is 36.4 years.
The average high temperature in July is 87.9 degrees, with an average low temperature in January of 21.9 degrees. The average rainfall is approximately 45.8 inches per year, with 13.4 inches of snow per year.
