Grinnell Real EstateGrinnell is located in Iowa. Grinnell, Iowa has a population of 9,028. Grinnell is less family-centric than the surrounding county with 26.94% of the households containing married families with children. The county average for households married with children is 29.66%. The median household income in Grinnell, Iowa is $44,525. The median household income for the surrounding county is $51,456 compared to the national median of $57,652. The median age of people living in Grinnell is 33.6 years. Grinnell WeatherThe average high temperature in July is 83.7 degrees, with an average low temperature in January of 10 degrees. The average rainfall is approximately 36.3 inches per year, with 30 inches of snow per year. Grinnell MapReal estate near GrinnellNearby CitiesNearby Cities Homes for Sale |