Katmai National Park & Preserve in September
September at Katmai National Park & Preserve averages a daytime high near 54°F and an overnight low around 39°F, with about 5.1" of precipitation. Visitation runs about 1.8× 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 15% of the park's yearly visitors come in September: roughly 7,900 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 3rd-busiest of the park's twelve months, sitting between the July peak (5.1×) and the January low (0×).
On our Best Time to Visit score September rates 61/100 ("Good"). Our recommended month is June: 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 43.6 miles from the park.
Because June, July and August together draw about 83% 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-hour midwinter low and the 18-hour summer high.
Park-wide, 2023 drew 33,763 recreation visits, down 34.5% from 51,511 in 2020.
Across the past decade overall visitation has eased about 10.3%, so September may feel a touch quieter than it once did.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 61°F / 45°F | 3.2× Very busy | 58 Fair |
| September | 54°F / 39°F | 1.8× Very busy | 61 Good |
| October | 43°F / 28°F | 0.0× Very quiet | 8 Poor |
All twelve months at Katmai, with the best time to visit.
Things to do at Katmai in September
The National Park Service tags 7 Katmai activities for fall. Each links to the park's own page for it.
- Take a Guided Tour to the Valley of Ten Thousand Smokes · 7 hours · reservation required
- Watch the Katmai Bearcam
- Hike to Dumpling Overlook
- Watch Bears at Brooks Camp
- Become A Katmai Jr. Ranger · 30-90 minutes
- Become a Not-So-Junior Ranger at Katmai
- Explore Katmai by Air · reservation required
Frequently Asked Questions
September averages a daytime high near 54°F and an overnight low around 39°F at Katmai National Park & Preserve, with about 5.1 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 43.6 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is very busy at Katmai National Park & Preserve (about 1.8× the average month). Our best-time score rates it "Good" at 61/100. Our recommended month is June.
The busiest month is July and the quietest is January. September sits at about 1.8× the park's average, or 15% of annual visitation.
A typical September sees about 8,000 recreation visits at Katmai National Park & Preserve, based on National Park Service monthly counts from 1979–2025.
Where to stay near Katmai in September
Booking a September trip to Katmai National Park & Preserve? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Katmai
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.