Rochester is located in Illinois. Rochester, Illinois has a population of 3,940. Rochester is more family-centric than the surrounding county with 36.73% of the households containing married families with children. The county average for households married with children is 25.59%.
The median household income in Rochester, Illinois is $105,140. The median household income for the surrounding county is $66,149 compared to the national median of $69,021. The median age of people living in Rochester is 42.6 years.
The average high temperature in July is 85.3 degrees, with an average low temperature in January of 18.4 degrees. The average rainfall is approximately 38.3 inches per year, with 18.4 inches of snow per year.
