Williamson is located in Illinois. Williamson, Illinois has a population of 230. Williamson is more family-centric than the surrounding county with 50% of the households containing married families with children. The county average for households married with children is 29.92%.
The median household income in Williamson, Illinois is $48,333. The median household income for the surrounding county is $56,536 compared to the national median of $57,652. The median age of people living in Williamson is 34.5 years.
The average high temperature in July is 88.8 degrees, with an average low temperature in January of 22.3 degrees. The average rainfall is approximately 41.9 inches per year, with 12.1 inches of snow per year.
