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Maryland State Climatologist Office

Maryland Monthly Averages
The state of Maryland is comprised of several different types of orography.  The eastern region of Maryland is significantly influenced by the Chesapeake Bay and the Atlantic Ocean, while the western region of Maryland is influenced by the Appalachian Mountains.  Below are links to Average Monthly Temperature, Average Monthly Precipitation, and Average Monthly Snowfall for Reagan National, Dulles, and Baltimore.


Reagan National Average Monthly Temperature (since 1871)

Reagan National Average Monthly Precipitation (since 1871)

Reagan National Average Monthly Snowfall (since 1888)

Dulles Average Monthly Temperature (since 1963)

Dulles Average Monthly Precipitation (since 1963)

Dulles Average Monthly Snowfall (since 1963)

Baltimore Average Monthly Temperature (since 1871)

Baltimore Average Monthly Precipitation (since 1871)

Baltimore Average Monthly Snowfall (since 1883)