Mount Rainier 20712 Real EstateMount Rainier is located in Maryland. Mount Rainier, Maryland 20712has a population of 8,290. Mount Rainier 20712 is more family-centric than the surrounding county with 34.22% of the households containing married families with children. The county average for households married with children is 26.76%. The median household income in Mount Rainier, Maryland 20712 is $59,268. The median household income for the surrounding county is $91,124 compared to the national median of $69,021. The median age of people living in Mount Rainier 20712 is 40.8 years. Mount Rainier WeatherThe average high temperature in July is 88.7 degrees, with an average low temperature in January of 25.6 degrees. The average rainfall is approximately 43.1 inches per year, with 13.6 inches of snow per year. Mount Rainier MapReal estate near Mount RainierNearby CitiesNearby Cities Homes for Sale |