Janesville Real EstateJanesville is located in Iowa. Janesville, Iowa has a population of 1,059. Janesville is more family-centric than the surrounding county with 37.79% of the households containing married families with children. The county average for households married with children is 31.71%. The median household income in Janesville, Iowa is $88,750. The median household income for the surrounding county is $76,782 compared to the national median of $69,021. The median age of people living in Janesville is 40.9 years. Janesville WeatherThe average high temperature in July is 83.5 degrees, with an average low temperature in January of 8.2 degrees. The average rainfall is approximately 35.8 inches per year, with 33.8 inches of snow per year. Janesville MapReal estate near JanesvilleNearby CitiesNearby Cities Homes for Sale |