Colchester is located in Illinois. Colchester, Illinois has a population of 1,566. Colchester is less family-centric than the surrounding county with 21.58% of the households containing married families with children. The county average for households married with children is 30.24%.
The median household income in Colchester, Illinois is $37,727. The median household income for the surrounding county is $42,911 compared to the national median of $57,652. The median age of people living in Colchester is 40.5 years.
The average high temperature in July is 86.7 degrees, with an average low temperature in January of 15.4 degrees. The average rainfall is approximately 39.2 inches per year, with 20.5 inches of snow per year.
