Grinnell 50112 Real EstateGrinnell is located in Iowa. Grinnell, Iowa 50112has a population of 9,028. Grinnell 50112 is less family-centric than the surrounding county with 28.93% 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 50112 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 50112 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 |