How Crowded Is Stonewall National Monument in September?

September runs about 0× Stonewall National Monument's average month, which makes it a very quiet month here — roughly 0% of the park's yearly visitors come in September.

In a typical September the park sees roughly 3,000 recreation visits, based on National Park Service monthly counts from 2017 to 2025.

It is the quietest month of the year at Stonewall; by contrast June, the busiest, runs about 10.6× the average — so September is the easiest time to have the place largely to yourself.

On our Best Time to Visit score September rates 86/100 ("Excellent") — the single best-rated month at Stonewall, balancing crowds against weather and daylight.

Typical September weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 76°F and an overnight low around 62°F, with about 4.3" of precipitation.

That average of about 69°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 92% 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 9.1-hour midwinter low and the 14.9-hour summer high.

Park-wide, 2024 drew 2,302,641 recreation visits, up 176.5% from 832,650 in 2023.