Lake Clark National Park & Preserve in September
September at Lake Clark National Park & Preserve averages a daytime high near 57°F and an overnight low around 42°F, with about 2.6" of precipitation. Visitation runs about 1.6× the park's average month, which makes September a very busy month here.
- Average low
- 42°F
- Average high
- 57°F
Range across the year: 10°F to 69°F
- Precipitation
- 2.6 in
- Daylight
- 12.5 hours
Roughly 14% of the park's yearly visitors come in September: roughly 1,800 recreation visits in a typical year, based on National Park Service monthly counts from 1982 to 2025.
That makes September the 4th-busiest of the park's twelve months, sitting between the August peak (3.3×) and the January low (0.1×).
On our Best Time to Visit score September rates 51/100 ("Fair"). Our recommended month is May: the lightest crowds of the park's good-weather months.
The daily average of about 50°F is cool, so layers and a shorter daylight window matter. These figures are 1991–2020 NOAA climate normals from the nearest station, about 36.5 miles from the park.
Because June, July and August together draw about 70% 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 5.3-hour midwinter low and the 18.6-hour summer high.
Park-wide, 2017 drew 22,755 recreation visits, up 7.8% from 21,102 in 2016.
Across the past decade overall visitation has risen about 109.9%, 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 | 66°F / 49°F | 3.3× Very busy | 45 Fair |
| September | 57°F / 42°F | 1.6× Very busy | 51 Fair |
| October | 44°F / 32°F | 0.4× Very quiet | 42 Poor |
All twelve months at Lake Clark, with the best time to visit.
Things to do at Lake Clark in September
The National Park Service tags 10 Lake Clark activities for fall. Here are 8 of them. Each links to the park's own page for it.
- Discover Bristol Bay Fishing History · 5-45 minutes
- Go Fly Fishing at Tanalian Falls · 2-5 hours
- Hike up Tanalian Mountain · 1-12 hours
- Kayak from Port Alsworth to Tommy Island · 2-7 hours
- Spend the Night in a Rustic Cabin · 1-5 days · reservation required
- Visit the Denison Sawmill Exhibit · 5-30 minutes
- Camp at Kontrashibuna Lake · 2-7 days
- Go Fishing on Lake Clark · 2-8 hours
Frequently Asked Questions
September averages a daytime high near 57°F and an overnight low around 42°F at Lake Clark National Park & Preserve, with about 2.6 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 36.5 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is very busy at Lake Clark National Park & Preserve (about 1.6× the average month). Our best-time score rates it "Fair" at 51/100. Our recommended month is May.
The busiest month is August and the quietest is January. September sits at about 1.6× the park's average, or 14% of annual visitation.
A typical September sees about 2,000 recreation visits at Lake Clark National Park & Preserve, based on National Park Service monthly counts from 1982–2025.
Where to stay near Lake Clark in September
Booking a September trip to Lake Clark National Park & Preserve? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Lake Clark
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 (1982–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.