How Crowded Is Longfellow House Washington's Headquarters in September?
September is a busy month at Longfellow House Washington's Headquarters National Historic Site, running about 1.5× the park's average month — roughly 13% of the year's visitors come in September. That puts it between the June peak and the January low. Overall our best-time score rates September as "Poor" for a visit. You'll get about 12.3 hours of daylight to explore.
Frequently Asked Questions
September is busy at Longfellow House Washington's Headquarters National Historic Site (about 1.5× the average month). Our best-time score rates it "Poor". The single best month overall is February.
The busiest month is June and the quietest is January. September sits at about 1.5× the park's average, or 13% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025). Updated 2026-06-20.