Port Saint John Real EstatePort Saint John is located in Florida. Port Saint John, Florida has a population of 8,874. The median household income in Port Saint John, Florida is $32,685. The median household income for the surrounding county is $51,536 compared to the national median of $57,652. The median age of people living in Port Saint John is 38.1 years. Port Saint John WeatherThe average high temperature in July is 91.6 degrees, with an average low temperature in January of 49.9 degrees. The average rainfall is approximately 52.9 inches per year, with 0 inches of snow per year. Port Saint John MapReal estate near Port Saint JohnNearby CitiesNearby Cities Homes for Sale |