How Crowded Is LBJ Memorial Grove on the Potomac in September?
September runs about 1.1× LBJ Memorial Grove on the Potomac's average month, which makes it an average month here — roughly 9% of the park's yearly visitors come in September.
In a typical September the park sees about 23,000 recreation visits, based on National Park Service monthly counts from 1984 to 2025.
That makes September the 6th-busiest of the park's twelve months, sitting between the July peak (1.3×) and the February low (0.6×).
On our Best Time to Visit score September rates 51/100 ("Fair"), versus the top-rated April at 62/100 — pleasant weather with noticeably thinner crowds (shoulder season).
Typical September weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 81°F and an overnight low around 64°F, with about 3.9" of precipitation.
That average of about 72°F is a comfortable range for hiking and being outdoors all day.
Because June, July and August together draw about 30% 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 236,042 recreation visits, down 2.2% from 241,358 in 2024.
Frequently Asked Questions
September is average at LBJ Memorial Grove on the Potomac (about 1.1× the average month). Our best-time score rates it "Fair". The single best month overall is April.
The busiest month is July and the quietest is February. September sits at about 1.1× the park's average, or 9% of annual visitation.
A typical September sees about 23,000 recreation visits at LBJ Memorial Grove on the Potomac, based on National Park Service monthly counts from 1984–2025.
Where to stay near LBJ Memorial Grove on the Potomac in September
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Source: National Park Service Visitor Use Statistics (1984–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-07-14.