Saint Charles is located in Maryland. Saint Charles, Maryland has a population of 39,595.
The median household income in Saint Charles, Maryland is $103,611. The median household income for the surrounding county is $107,808 compared to the national median of $69,021. The median age of people living in Saint Charles is 36.3 years.
The average high temperature in July is 86.5 degrees, with an average low temperature in January of 27 degrees. The average rainfall is approximately 43.9 inches per year, with 15.6 inches of snow per year.