Joliet is located in Illinois. Joliet, Illinois has a population of 148,172. Joliet is less family-centric than the surrounding county with 37.92% of the households containing married families with children. The county average for households married with children is 39.47%.
The median household income in Joliet, Illinois is $63,359. The median household income for the surrounding county is $80,782 compared to the national median of $57,652. The median age of people living in Joliet is 33.5 years.
The average high temperature in July is 84.1 degrees, with an average low temperature in January of 16.3 degrees. The average rainfall is approximately 38.2 inches per year, with 31.4 inches of snow per year.