Average Rainfall for Maryland in May





The tables below give monthly averages for rainfall during May at cities, towns and parks in Maryland.

Each place has a total for the amount of precipitation it usually receives this month. Most sites also have information on the number of days with wet weather. That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The rainfall totals are averages based on weather data collected from 1981 to 2010 for the NOAA National Climatic Data Center.

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 82
10 Chestertown 4.1 104
Ocean City 3.6 92
10 Royal Oak 4.2 106
10 Salisbury 3.5 89
10 Snow Hill 3.5 89

Central Maryland

May averages for total rainfall
Days Place Inches Milli­metres
Aberdeen 4.0 100
11 Annapolis 4.2 107
11 Baltimore 4.0 101
11 Beltsville 4.3 110
14 Catoctin Mountain Park 5.0 126
11 College Park 4.4 112
11 Frederick 4.1 105
11 La Plata 3.8 96
12 Rockville 4.1 105

Western Maryland

Average amount of rain in May
Days Place Inches Milli­metres
13 Cumberland 4.0 102
Hagerstown 4.0 102
15 Oakland 5.1 131
14 Savage River Reservoir Dam 4.5 115
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

Maryland Precipitation
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