How Crowded Is Harry S Truman National Historic Site in September?
September runs about 1.3× Harry S Truman National Historic Site's average month, which makes it a busy month here — roughly 10% of the park's yearly visitors come in September.
In a typical September the park sees roughly 2,700 recreation visits, based on National Park Service monthly counts from 1984 to 2025.
That makes September the 5th-busiest of the park's twelve months, sitting between the July peak (1.8×) and the January low (0.3×).
On our Best Time to Visit score September rates 40/100 ("Poor"), versus the top-rated January at 78/100 — the best overall balance of crowds and daylight.
Because June, July and August together draw about 41% 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 12.2 hours of daylight in September to explore — between the 9.3-hour midwinter low and the 14.7-hour summer high.
Park-wide, 2025 drew 19,296 recreation visits, down 19.9% from 24,102 in 2024.
Across the past decade overall visitation has eased about 32.5%, so September may feel a touch quieter than it once did.
Frequently Asked Questions
September is busy at Harry S Truman National Historic Site (about 1.3× the average month). Our best-time score rates it "Poor". The single best month overall is January.
The busiest month is July and the quietest is January. September sits at about 1.3× the park's average, or 10% of annual visitation.
A typical September sees about 3,000 recreation visits at Harry S Truman National Historic Site, based on National Park Service monthly counts from 1984–2025.
Where to stay near Harry S Truman 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 (1984–2025). Updated 2026-07-14.