Glen St Mary Real EstateGlen St Mary is located in Florida. Glen St Mary, Florida has a population of 3,776. The median household income in Glen St Mary, Florida is $56,886. The median household income for the surrounding county is $59,506 compared to the national median of $57,652. The median age of people living in Glen St Mary is 34.1 years. Glen St Mary WeatherThe average high temperature in July is 91.5 degrees, with an average low temperature in January of 37.7 degrees. The average rainfall is approximately 50.9 inches per year, with 0 inches of snow per year. Glen St Mary MapReal estate near Glen St MaryNearby CitiesNearby Cities Homes for Sale |