How Crowded Is Knife River Indian Villages National Historic Site in September?

September runs about 1.8× Knife River Indian Villages National Historic Site's average month, which makes it a very busy month here — roughly 15% of the park's yearly visitors come in September.

In a typical September the park sees roughly 1,500 recreation visits, based on National Park Service monthly counts from 1981 to 2025.

That makes September the 4th-busiest of the park's twelve months, sitting between the July peak (2.9×) and the January low (0.1×).

On our Best Time to Visit score September rates 59/100 ("Fair"), versus the top-rated June at 67/100 — 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 71°F and an overnight low around 48°F.

That average of about 59°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 61% 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 12.3 hours of daylight in September to explore — between the 8.3-hour midwinter low and the 15.7-hour summer high.

Park-wide, 2025 drew 9,048 recreation visits, down 16.7% from 10,867 in 2024.

Across the past decade overall visitation has eased about 7.2%, so September may feel a touch quieter than it once did.