How Crowded Is Marsh - Billings - Rockefeller National Historical Park in September?

September runs about 1.8× Marsh - Billings - Rockefeller National Historical Park's average month, which makes it a very busy month here — roughly 15% of the park's yearly visitors come in September.

In a typical September the park sees roughly 8,500 recreation visits, based on National Park Service monthly counts from 1998 to 2025.

That makes September the 3rd-busiest of the park's twelve months, sitting between the October peak (2×) and the January low (0.3×).

On our Best Time to Visit score September rates 45/100 ("Fair"), versus the top-rated May at 68/100 — best overall balance of crowds, weather and daylight.

Typical September weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 73°F and an overnight low around 47°F, with about 3.6" of precipitation.

That average of about 60°F is a comfortable range for hiking and being outdoors all day.

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 12.3 hours of daylight in September to explore — between the 8.8-hour midwinter low and the 15.2-hour summer high.

Park-wide, 2025 drew 77,524 recreation visits, down 5.1% from 81,713 in 2024.

Across the past decade overall visitation has risen about 45.6%, so a September visit is likely to feel busier than it did a few years ago.