How Crowded Is Guadalupe Mountains National Park in September?

September runs about 0.7× Guadalupe Mountains National Park's average month, which makes it a quiet month here — roughly 6% of the park's yearly visitors come in September.

In a typical September the park sees about 12,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes September the 10th-busiest of the park's twelve months, sitting between the March peak (1.8×) and the January low (0.6×).

On our Best Time to Visit score September rates 84/100 ("Excellent"), versus the top-rated August at 81/100 — 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 80°F and an overnight low around 58°F, with about 2.3" 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 19% 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 9.9-hour midwinter low and the 14.1-hour summer high.

Park-wide, 2025 drew 206,423 recreation visits, down 8.7% from 226,134 in 2024.

Across the past decade overall visitation has risen about 19.8%, so a September visit is likely to feel busier than it did a few years ago.