Aniakchak National Monument & Preserve in September
September at Aniakchak National Monument & Preserve averages a daytime high near 54°F and an overnight low around 39°F, with about 5.1" of precipitation. Visitation runs about 3.7× the park's average month, which makes September a very busy month here.
- Average low
- 39°F
- Average high
- 54°F
Range across the year: 10°F to 62°F
- Precipitation
- 5.1 in
- Daylight
- 12.5 hours
Roughly 31% of the park's yearly visitors come in September: about 400 recreation visits in a typical year, based on National Park Service monthly counts from 1989 to 2025.
It is the single busiest month of the year at Aniakchak; February, the quietest, runs only about 0.1× the average — a 62-to-1 swing between high and low season.
On our Best Time to Visit score September rates 22/100 ("Poor"). Our recommended month is May: the lightest crowds of the park's good-weather months.
The daily average of about 47°F is cool, so layers and a shorter daylight window matter. These figures are 1991–2020 NOAA climate normals from the nearest station, about 111.5 miles from the park.
Because June, July and August together draw about 49% 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 12.5 hours of daylight in September to explore — between the 6.5-hour midwinter low and the 17.5-hour summer high.
Park-wide, 1994 drew 1,193 recreation visits, down 25.1% from 1,593 in 1993.
Across the past decade overall visitation has risen about 60.8%, so a September visit is likely to feel busier than it did a few years ago.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 61°F / 45°F | 3.4× Very busy | 38 Poor |
| September | 54°F / 39°F | 3.7× Very busy | 22 Poor |
| October | 43°F / 28°F | 1.0× Average | 40 Poor |
All twelve months at Aniakchak, with the best time to visit.
Frequently Asked Questions
September averages a daytime high near 54°F and an overnight low around 39°F at Aniakchak National Monument & Preserve, with about 5.1 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 111.5 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is very busy at Aniakchak National Monument & Preserve (about 3.7× the average month). Our best-time score rates it "Poor" at 22/100. Our recommended month is May.
The busiest month is September and the quietest is February. September sits at about 3.7× the park's average, or 31% of annual visitation.
A typical September sees about 0,000 recreation visits at Aniakchak National Monument & Preserve, based on National Park Service monthly counts from 1989–2025.
Where to stay near Aniakchak in September
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Top-rated places to stay near Aniakchak
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1989–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.