How Crowded Is Lake Mead National Recreation Area in September?

September runs about 1.1× Lake Mead National Recreation Area's average month, which makes it an average month here — roughly 9% of the park's yearly visitors come in September.

In a typical September the park sees about 622,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes September the 5th-busiest of the park's twelve months, sitting between the June peak (1.3×) and the December low (0.7×).

On our Best Time to Visit score September rates 48/100 ("Fair"), versus the top-rated November at 69/100 — 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 99°F and an overnight low around 71°F, with about 0.3" of precipitation.

That average of about 85°F is warm enough that midday heat is worth planning around.

Because June, July and August together draw about 30% 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, 2025 drew 6,135,586 recreation visits, down 4.3% from 6,412,854 in 2024.

Across the past decade overall visitation has eased about 17.4%, so September may feel a touch quieter than it once did.