Average Rainfall for Maryland in May

The tables below give monthly averages for rainfall during May at cities, communities and other locations around Maryland.

Each place has a total for the amount of precipitation it usually receives this month. 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 rainfall 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 monthly precipitation in May
Days Place Inches Milli­metres
10 Assateague Island 3.2 81
10 Chestertown 3.9 99
12 Ocean City 3.8 96
11 Royal Oak 4.0 100
10 Salisbury 3.7 94
11 Snow Hill 3.7 93

Central Maryland

May averages for total rainfall
Days Place Inches Milli­metres
12 Baltimore 3.9 98
11 Beltsville 4.3 108
14 Catoctin Mountain Park 4.9 124
10 Frederick 4.0 101
11 Laurel 4.4 112
11 Mechanicsville 4.3 110
12 Patuxent River 3.7 93
11 Rockville 3.6 90

Western Maryland

Average amount of rain in May
Days Place Inches Milli­metres
14 Cumberland 4.2 107
16 Frostburg 5.2 132
14 Hagerstown 3.6 90
16 Oakland 5.3 136
14 Savage River Reservoir Dam 4.6 116
Reference

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

Maryland Precipitation
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