Rochester is located in Illinois. Rochester, Illinois has a population of 3,114. Rochester is more family-centric than the surrounding county with 41% households with children. The county percentage for households with children is 26%.
The median household income in Rochester, Illinois is $103,039. The median household income for the surrounding county is $64,574 compared to the national median of $66,222. The median age of people living in Rochester is 44.8 years.
The average high temperature in July is 86.5 degrees, with an average low temperature in January of 17.1 degrees. The annual precipitation is 36.3.