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.

Maryland State Map of 1981-2010 Monthly Normals (University of Washington)
- Google Map by Station Site - Mean Monthly Precipitation (PCP), Mean Daily Maximum Temperature (MAX), and Mean Daily Minimum Temperature (MIN)

1981-2010 Maryland Monthly Climate Normals (Golden Gate Weather Services)

1981-2010 Maryland Daily Climate Normals (Golden Gate Weather Services)

NCDC All-time Weather Extremes

Reagan National Average Monthly:
Temperature (since 1871), Precipitation (since 1871), Snowfall (since 1888)

Dulles Average Monthly:
Temperature (since 1963), Precipitation (since 1963), Snowfall (since 1963)

Baltimore Average Monthly:
Temperature (since 1871), Precipitation (since 1871), Snowfall (since 1883)


The Maryland State Climatologist Office welcomes data requests and any questions or concerns you may have about our services.  You may contact us 24 hours a day, 7 days a week via telephone or e-mail.  If we are not in the office at the time of your call, we will get back to you as soon as we can.  Please contact us using the information below, or fill out our Data Request Form by clicking on the 'Data' link under the 'Climate Data' heading.  Thank you for letting us assist you in collecting climate data.

Whenever possible, please use email as it is the prefered method of communication to our office. It also allows us to have a record of data requests.

Phone: (301) 405-7223

Click here for directions to our office.

Computer and Space Sciences Building
University of MarylandCollege Park 20742
Phone: (301) 405-7223
Fax: (301) 314-9482