January
January visitability 49, crowd 24, value 52.
This page lists month windows for Fort McHenry National Monument and Historic Shrine from the checked-in NPS snapshot and the dated source cards on the page.
Answer Brief
January visitability 49, crowd 24, value 52.
February visitability 53, crowd 24, value 55.
March visitability 60, crowd 28, value 62.
April visitability 63, crowd 42, value 63.
May visitability 64, crowd 58, value 62.
June visitability 62, crowd 76, value 59.
July visitability 59, crowd 92, value 54.
August visitability 60, crowd 90, value 55.
September visitability 61, crowd 74, value 57.
October visitability 61, crowd 56, value 59.
November visitability 58, crowd 34, value 59.
December visitability 52, crowd 28, value 53.
How NPS Sounds modeled audio works
Read the NPS Sounds methodology and about NPS Sounds for how month windows are assembled.
Data Behind This Reading
Fort McHenry National Monument and Historic Shrine is identified as National Monument and Historic Shrine with NPS code fomc.
SourceOfficial alerts should be verified on the NPS page. This site uses a checked-in snapshot, not a live operations feed.
SourceTemperatures and weather in the spring and fall months tend to be mild. Ice, snow, and freezing temperatures can occur during winter. Extreme heat can occur during the summer months. Inclement weather may impact park hours of operation year round. Refer to the park alerts or call ahead to confirm operating hours.
Sourcebest_time page source cards come from the data snapshot October 27, 2026.
SourceNational Battlefield
Best primary window for Antietam: May, with April and June as strong shoulder months.
National Seashore
Best primary window for Assateague Island: May, with April and June as strong shoulder months.
Parkway
Best primary window for Baltimore-Washington: May, with April and June as strong shoulder months.
Park
Best primary window for Catoctin Mountain: May, with April and June as strong shoulder months.