Monticello Real EstateMonticello is located in Iowa. Monticello, Iowa has a population of 3,817. Monticello is less family-centric than the surrounding county with 28.5% of the households containing married families with children. The county average for households married with children is 30.85%. The median household income in Monticello, Iowa is $51,341. The median household income for the surrounding county is $58,391 compared to the national median of $57,652. The median age of people living in Monticello is 39.9 years. Monticello WeatherThe average high temperature in July is 83.6 degrees, with an average low temperature in January of 9.1 degrees. The average rainfall is approximately 36.6 inches per year, with 22 inches of snow per year. Monticello MapReal estate near MonticelloNearby CitiesNearby Cities Homes for Sale |