Grassy Key is located in Florida. Grassy Key, Florida has a population of 4,374.
The median household income in Grassy Key, Florida is $54,196. The median household income for the surrounding county is $63,030 compared to the national median of $57,652. The median age of people living in Grassy Key is 43.5 years.
The average high temperature in July is 90.8 degrees, with an average low temperature in January of 64.2 degrees. The average rainfall is approximately 45.9 inches per year, with 0 inches of snow per year.