Lake Clark · September
Lake Clark in September
September is one of the best times to visit Lake Clark — quieter than August, busier than October.
Expect light crowds (3/10), highs near 57°F, and about 12.9 hours of daylight.
Crowd score
How busy it gets
Well below this park's peak — easy parking, open trails, short lines.
About 24% of this park's busiest month.
Source: NPS Visitor Use Statistics, 2023–2025
Data: NPS visitation 2023–2025 · crowd scores computed Oct 2026. How this is calculated →
Computed from federal data · Methodology by Sharon Ben-Moshe
Visitation
Typical September visits vs. the year
September draws about 8% of Lake Clark’s yearly visitors.
Typical monthly recreation visits, averaged over the most recent three full years.
Source: NPS Visitor Use Statistics, 2023–2025
Weather
September weather
- Avg high
- 57°F
- Avg low
- 42°F
- Precipitation
- 2.6"
- Sunrise
- 5:42 AM
- Sunset
- 6:34 PM
- Daylight
- 12.9h
Source: NOAA 1991–2020 climate normals, PORT ALSWORTH, AK US
What's open
Lake Clark in September: access
The park and preserve are open 24 hours per day, seven days per week year round. However, visitor services are limited Labor Day through Memorial Day. Seasonal and temporary closures are listed by location on the Operating Hours & Seasons page.
No seasonal road or area closures reported for this park.
Source: NPS Data API
Conditions
Current alerts
No current alerts or closures reported for this park.
Source: NPS Data API
Context
Lake Clark crowds across the year
FAQ
Lake Clark in September
How busy is Lake Clark in September?
September rates 3/10 for crowds (Quiet) at Lake Clark National Park & Preserve — about 24% of its busiest month. Typical recreation visits: 1,552.
What is the weather like at Lake Clark in September?
In September, Lake Clark averages a high of 57°F and a low of 42°F, with about 2.6 inches of precipitation.
How much does it cost to visit Lake Clark?
Entry to Lake Clark is free.
When is Lake Clark least crowded?
Lake Clark is quietest in January and February. If your dates are flexible, those months bring the thinnest crowds of the year.
How many hours of daylight does Lake Clark get in September?
In mid-September, Lake Clark gets about 12.9 hours of daylight, with sunrise around 5:42 AM and sunset around 6:34 PM.