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
| 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
| 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
| 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.