Maryland Climate Data
NOAA 30-year climate normals for all 24 counties.
NOAA NCEI 1991-2020 Climate NormalsState Avg Temp
56.1°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
55.1°F avg
Calvert County
58.9°F avg
Caroline County
57.1°F avg
Carroll County
53.6°F avg
Cecil County
55.3°F avg
Charles County
58.1°F avg
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
55.6°F avg
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
58.9°F avg
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.