How Crowded Is Minidoka National Historic Site in September?

September runs about 1.4× Minidoka National Historic Site'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 roughly 1,900 recreation visits, based on National Park Service monthly counts from 2017 to 2025.

That makes September the 4th-busiest of the park's twelve months, sitting between the July peak (2.6×) and the December low (0.1×).

On our Best Time to Visit score September rates 65/100 ("Good") — the single best-rated month at Minidoka, balancing crowds against weather and daylight.

Typical September weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 78°F and an overnight low around 45°F, with about 0.5" of precipitation.

That average of about 61°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 58% 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 8.9-hour midwinter low and the 15.1-hour summer high.

Park-wide, 2025 drew 43,539 recreation visits, up 137.2% from 18,358 in 2023.

Across the past decade overall visitation has risen about 68%, so a September visit is likely to feel busier than it did a few years ago.