Average Annual Precipitation for Maryland
The tables below give yearly averages for rainfall plus snowfall at cities, towns and parks in Maryland.
Each place has a total for the amount of precipitation it usually receives in a year. Most locations 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 annual precipitation 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
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 114 | Assateague Island | 44.1 | 1120 |
| 109 | Chestertown | 44.1 | 1120 |
| – | Ocean City | 42.4 | 1076 |
| 112 | Royal Oak | 46.8 | 1188 |
| 116 | Salisbury | 45.9 | 1166 |
| 114 | Snow Hill | 46.1 | 1171 |
Central Maryland
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| – | Aberdeen | 44.8 | 1138 |
| 115 | Annapolis | 47.3 | 1201 |
| 116 | Baltimore | 41.9 | 1064 |
| 114 | Beltsville | 41.8 | 1063 |
| 132 | Catoctin Mountain Park | 47.3 | 1201 |
| 106 | College Park | 43.7 | 1111 |
| 107 | Frederick | 41.0 | 1042 |
| 111 | La Plata | 43.6 | 1108 |
| 112 | Rockville | 40.3 | 1023 |
Western Maryland
| Days | Place | Inches | Millimetres |
|---|---|---|---|
| 127 | Cumberland | 37.4 | 949 |
| – | Hagerstown | 39.3 | 998 |
| 159 | Oakland | 47.8 | 1215 |
| 136 | Savage River Reservoir Dam | 39.8 | 1010 |
Reference
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.