How Crowded Is Great Smoky Mountains National Park in September?

September runs about 1.2× Great Smoky Mountains National Park's average month, which makes it a busy month here — roughly 10% of the park's yearly visitors come in September.

In a typical September the park sees 1.2 million 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 July peak (1.5×) and the January low (0.4×).

On our Best Time to Visit score September rates 46/100 ("Fair"), versus the top-rated August at 53/100 — best overall balance of crowds, weather and daylight.

Typical September weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 68°F and an overnight low around 51°F, with about 5.4" of precipitation.

That average of about 60°F is a comfortable range for hiking and being outdoors all day.

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 9.6-hour midwinter low and the 14.4-hour summer high.

Park-wide, 2025 drew 11,527,939 recreation visits, down 5.4% from 12,191,834 in 2024.

Across the past decade overall visitation has risen about 9.2%, so a September visit is likely to feel busier than it did a few years ago.