Average Annual Precipitation for Maryland





The tables below give yearly averages for rainfall plus snowfall at cities, communities and other locations around Maryland.

Each place has a total for the amount of precipitation it usually receives in a year. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The annual precipitation totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for each region of the state: Eastern Shore, Central Maryland and Western Maryland.

Eastern Shore

Average yearly precipitation
Days Place Inches Milli­metres
113 Assateague Island 44.9 1140
108 Chestertown 46.0 1167
130 Ocean City 42.6 1083
118 Royal Oak 47.6 1209
120 Salisbury 48.0 1219
113 Snow Hill 47.4 1203

Central Maryland

Annual averages for rainfall plus snowfall
Days Place Inches Milli­metres
121 Baltimore 45.0 1143
116 Beltsville 44.0 1118
136 Catoctin Mountain Park 48.6 1235
105 Frederick 43.5 1105
112 Laurel 47.5 1207
115 Mechanicsville 48.1 1222
118 Patuxent River 45.3 1151
113 Rockville 41.3 1050

Western Maryland

Average amount of rain and snow a year
Days Place Inches Milli­metres
136 Cumberland 39.2 996
153 Frostburg 45.2 1148
124 Hagerstown 35.6 904
171 Oakland 50.8 1290
128 Savage River Reservoir Dam 41.4 1052
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Maryland Precipitation
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