Saint Charles is located in Maryland. Saint Charles, Maryland has a population of 36,611.
The median household income in Saint Charles, Maryland is $91,426. The median household income for the surrounding county is $93,973 compared to the national median of $57,652. The median age of people living in Saint Charles is 35.3 years.
The average high temperature in July is 84.9 degrees, with an average low temperature in January of 28.5 degrees. The average rainfall is approximately 43.6 inches per year, with 16.1 inches of snow per year.