Maryland Climate Data
NOAA 30-year climate normals for all 24 counties.
State Avg Temp
55.9°F
Hottest County
Calvert County
58.9°F avg
Coldest County
Garrett County
49.8°F avg
Wettest County
Carroll County
47.9" precip
All Maryland Counties
Allegany County
51.2°F avg
Anne Arundel County
57.6°F avg
Baltimore city
57.6°F avg
Baltimore County
Data pending
Calvert County
58.9°F avg
Caroline County
Data pending
Carroll County
53.6°F avg
Cecil County
Data pending
Charles County
Data pending
Dorchester County
58.3°F avg
Frederick County
54.5°F avg
Garrett County
49.8°F avg
Harford County
55.3°F avg
Howard County
Data pending
Kent County
56.0°F avg
Montgomery County
55.1°F avg
Prince George's County
56.2°F avg
Queen Anne's County
57.1°F avg
Somerset County
Data pending
St. Mary's County
57.3°F avg
Talbot County
58.0°F avg
Washington County
53.5°F avg
Wicomico County
57.8°F avg
Worcester County
57.8°F avg
Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.