Grain Valley is located in Missouri. Grain Valley, Missouri has a population of 15,435. Grain Valley is more family-centric than the surrounding county with 40.1% of the households containing married families with children. The county average for households married with children is 28.36%.
The median household income in Grain Valley, Missouri is $81,429. The median household income for the surrounding county is $60,800 compared to the national median of $69,021. The median age of people living in Grain Valley is 35.1 years.
The average high temperature in July is 87.9 degrees, with an average low temperature in January of 19.2 degrees. The average rainfall is approximately 42.9 inches per year, with 13 inches of snow per year.
