Monticello is located in Illinois. Monticello, Illinois has a population of 6,202. Monticello is less family-centric than the surrounding county with 28.77% of the households containing married families with children. The county average for households married with children is 29.37%.
The median household income in Monticello, Illinois is $83,878. The median household income for the surrounding county is $77,559 compared to the national median of $69,021. The median age of people living in Monticello is 39.9 years.
The average high temperature in July is 84.2 degrees, with an average low temperature in January of 16.3 degrees. The average rainfall is approximately 39.8 inches per year, with 15.1 inches of snow per year.
