Anne Arundel County Climate
Anne Arundel County, Maryland
Avg Annual Temp
57.6°F
Annual Precip
44.5"
Annual Snowfall
19.3"
Extreme Heat Days
31.366666666666664
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Anne Arundel County Weather
A warm, coastal subtropical climate
Anne Arundel's 57.6°F annual average is warmer than the national median temperature. This humid subtropical climate is heavily influenced by its proximity to the Chesapeake Bay.
Warmer than the state average
The county is warmer than the Maryland state average of 55.9°F. It ranks among the warmer jurisdictions in the state, benefiting from the moderating effects of coastal water.
Typical of the central coast
The county shares a 57.6°F average with Baltimore city but experiences slightly less July heat. Its 44.5 inches of annual rainfall is very close to the state average of 45.7 inches.
Humid summers and moderate winters
July brings an average of 79.2°F and 31 days of extreme heat over 90°F. Winters are relatively mild with 19.3 inches of snow and a January average of 35.9°F.
Focus on cooling and drainage
High-efficiency air conditioning is essential for the month of extreme heat days. Waterfront residents should also prepare for 44.5 inches of rain, which can impact local drainage and tide levels.
Frequently Asked Questions
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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.