How Crowded Is Zion National Park in September?

September runs about 1.3× Zion National Park'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 489,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes September the 4th-busiest of the park's twelve months, sitting between the June peak (1.5×) and the January low (0.3×).

On our Best Time to Visit score September rates 49/100 ("Fair"), versus the top-rated April at 54/100 — 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 91°F and an overnight low around 61°F, with about 1.2" of precipitation.

That average of about 76°F is warm enough that midday heat is worth planning around.

Because June, July and August together draw about 35% 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 9.4-hour midwinter low and the 14.6-hour summer high.

Park-wide, 2025 drew 4,984,525 recreation visits, up 0.8% from 4,946,592 in 2024.

Across the past decade overall visitation has risen about 14.6%, so a September visit is likely to feel busier than it did a few years ago.