Maryland
National parks in Maryland
Maryland has no national park, but 9 other busy National Park System sites in this guide. The best months below balance mild weather and crowds.
| Park | Best months | Busiest | July high / January low °F | Visitors a year |
|---|---|---|---|---|
| Chesapeake and Ohio Canal National Historical Park | Oct and Nov | Sep | 87° / 23° | 4,491,000 |
| Assateague Island National Seashore | Apr, May and Nov | Jul | 86° / 31° | 2,320,000 |
| Fort Washington Park | Apr and Nov | Jul | 90° / 30° | 480,000 |
| Catoctin Mountain Park | Apr | Oct | 84° / 23° | 425,000 |
| Fort McHenry National Monument and Historic Shrine | May, Oct and Nov | Jun | 90° / 30° | 369,000 |
| Piscataway Park | Apr, Oct and Nov | Jun | 88° / 27° | 297,000 |
| Antietam National Battlefield | Oct and Nov | Sep | 86° / 21° | 171,000 |
| Monocacy National Battlefield | Apr, Oct and Nov | Jul | 89° / 27° | 122,000 |
| Greenbelt Park | Apr and Nov | May | 87° / 25° | 100,000 |
Maryland parks by month
| Month | Visitors, all 9 sites | Sites with mild weather |
|---|---|---|
| January | 356,000 | none |
| February | 390,000 | none |
| March | 583,000 | none |
| April | 766,000 | Assateague Island National Seashore, Fort Washington Park, Catoctin Mountain Park, Piscataway Park, Monocacy National Battlefield, Greenbelt Park |
| May | 855,000 | Assateague Island National Seashore, Fort McHenry National Monument and Historic Shrine |
| June | 1,039,000 | none |
| July | 1,117,000 | none |
| August | 1,041,000 | none |
| September | 885,000 | none |
| October | 758,000 | Chesapeake and Ohio Canal National Historical Park, Fort McHenry National Monument and Historic Shrine, Piscataway Park, Antietam National Battlefield, Monocacy National Battlefield |
| November | 574,000 | Chesapeake and Ohio Canal National Historical Park, Assateague Island National Seashore, Fort Washington Park, Fort McHenry National Monument and Historic Shrine, Piscataway Park, Antietam National Battlefield, Monocacy National Battlefield, Greenbelt Park |
| December | 409,000 | none |
Weather 1991–2020 NOAA normals at each park's nearest station. Visitors National Park Service recreation visits, 2023–2025 average. Mild means an average high of 55–80°F without above-normal rain.