How Crowded Is Alibates Flint Quarries National Monument in September?

September runs about 1.3× Alibates Flint Quarries National Monument's average month, which makes it a busy month here — roughly 11% of the park's yearly visitors come in September.

In a typical September the park sees about 710 recreation visits, based on National Park Service monthly counts from 1979 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 64/100 ("Good"), versus the top-rated April at 61/100 — 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 87°F and an overnight low around 57°F, with about 1.6" 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 28% 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 9.6-hour midwinter low and the 14.4-hour summer high.

Park-wide, 2022 drew 7,520 recreation visits, down 21.1% from 9,526 in 2021.

Across the past decade overall visitation has risen about 47.3%, so a September visit is likely to feel busier than it did a few years ago.