How Crowded Is Adams National Historical Park in September?
September runs about 1.7× Adams National Historical Park's average month, which makes it a very busy month here — roughly 14% of the park's yearly visitors come in September.
In a typical September the park sees about 13,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 4th-busiest of the park's twelve months, sitting between the July peak (2.6×) and the January low (0×).
On our Best Time to Visit score September rates 40/100 ("Poor"), versus the top-rated March at 84/100 — the best overall balance of crowds and daylight.
Because June, July and August together draw about 53% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 12.3 hours of daylight in September to explore — between the 8.9-hour midwinter low and the 15.1-hour summer high.
Park-wide, 2025 drew 48,726 recreation visits, up 6.7% from 45,656 in 2024.
Across the past decade overall visitation has eased about 80.1%, so September may feel a touch quieter than it once did.
Frequently Asked Questions
September is very busy at Adams National Historical Park (about 1.7× the average month). Our best-time score rates it "Poor". The single best month overall is March.
The busiest month is July and the quietest is January. September sits at about 1.7× the park's average, or 14% of annual visitation.
A typical September sees about 13,000 recreation visits at Adams National Historical Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Adams in September
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025). Updated 2026-07-14.