Mt Gretna is located in Pennsylvania. Mt Gretna, Pennsylvania has a population of 123.
The median household income in Mt Gretna, Pennsylvania is $121,026. The median household income for the surrounding county is $57,698 compared to the national median of $57,652. The median age of people living in Mt Gretna is 69.5 years.
The average high temperature in July is 83.9 degrees, with an average low temperature in January of 20.1 degrees. The average rainfall is approximately 43.6 inches per year, with 21.2 inches of snow per year.
