Grand Teton · September
Grand Teton in September
September is a busy time to visit Grand Teton — quieter than August, busier than October.
Expect heavy crowds (8/10), highs near 66°F, about 12.5 hours of daylight, and 1 seasonal closure in effect.
Crowd score
How busy it gets
Approaching peak season — expect full lots by mid-morning and busy overlooks.
About 79% of this park's busiest month.
Source: NPS Visitor Use Statistics, 2023–2025
Data: NPS visitation 2023–2025 · crowd scores computed Oct 2026 · alerts checked Oct 18, 2026. How this is calculated →
Computed from federal data · Methodology by Sharon Ben-Moshe
Visitation
Typical September visits vs. the year
September draws about 17% of Grand Teton’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
- 66°F
- Avg low
- 34°F
- Precipitation
- 1.6"
- Sunrise
- 6:02 AM
- Sunset
- 6:32 PM
- Daylight
- 12.5h
Source: NOAA 1991–2020 climate normals, MORAN 5WNW, WY US
What's open
Grand Teton in September: access
Visitors may enter the park at any time, but visitor services and motor vehicle access vary throughout the year.
Seasonal closures may apply:
- Park Closure
Death Canyon Trailhead Construction Closure
Death Canyon Road and Trailhead are closed to all use. Start hikes at alternative trailheads such as Granite Canyon, LSR Preserve, and Taggart Lake.
Details on nps.gov →
Source: NPS Data API
Conditions
Current alerts
- Caution
Construction in the South End of the Park
Moose-Wilson Road between Moose and LSR Preserve closed. Expect occasional short delays between Granite Entrance and LSR Preserve. Possible intermittent delays on Teton Park Road at Cottonwood Creek Picnic Area. Cottonwood Creek picnic area closed. Taggart Trail detour in place. Mormon Row area open with some construction activity.
Details on nps.gov → - Caution
Construction on HWY 26/89/191
Construction taking place on US HWY 26/89/191 south of Moran Junction. Expect 20-minute delays in both directions.
Details on nps.gov → - Information
Plan Ahead for 2027 Construction
Plan ahead for construction in 2027. Check road construction and park construction pages for more information.
Details on nps.gov →
Source: NPS Data API
Context
Grand Teton crowds across the year
Alternatives
Quieter nearby in September
FAQ
Grand Teton in September
How busy is Grand Teton in September?
September rates 8/10 for crowds (Busy) at Grand Teton National Park — about 79% of its busiest month. Typical recreation visits: 599,905.
What is the weather like at Grand Teton in September?
In September, Grand Teton averages a high of 66°F and a low of 34°F, with about 1.6 inches of precipitation.
How much does it cost to visit Grand Teton?
Entrance to Grand Teton costs $35 (Park entrance fee for 7 days for a private, non-commercial vehicle.).
When is Grand Teton least crowded?
Grand Teton 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 Grand Teton get in September?
In mid-September, Grand Teton gets about 12.5 hours of daylight, with sunrise around 6:02 AM and sunset around 6:32 PM.