Grand Teton National Park in September
September at Grand Teton National Park averages a daytime high near 66°F and an overnight low around 34°F, with about 1.6" of precipitation. Visitation runs about 1.9× the park's average month, which makes September a very busy month here.
- Average low
- 34°F
- Average high
- 66°F
Range across the year: 1°F to 77°F
- Precipitation
- 1.6 in
- Daylight
- 12.3 hours
Roughly 16% of the park's yearly visitors come in September: about 535,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 4th-busiest of the park's twelve months, sitting between the July peak (2.6×) and the December low (0.2×).
September is our recommended month at Grand Teton: 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 6.4 miles from the park.
Because June, July and August together draw about 60% 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 12.3 hours of daylight in September to explore — between the 8.7-hour midwinter low and the 15.3-hour summer high.
Park-wide, 2025 drew 3,800,648 recreation visits, up 4.8% from 3,628,222 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 76°F / 40°F | 2.4× Very busy | 47 Fair |
| September | 66°F / 34°F | 1.9× Very busy | 43 Poor |
| October | 51°F / 25°F | 0.8× Quiet | 36 Poor |
All twelve months at Grand Teton, with the best time to visit.
Things to do at Grand Teton in September
The National Park Service tags 51 Grand Teton activities for fall. Here are 8 of them. Each links to the park's own page for it.
- Death Canyon - Static Peak Divide Junction · 4-6 hours
- Forks of Cascade Canyon · 5-9 hours
- Grand View Point · 1-4 hours
- Holly Lake · 7-9 hours
- Lake Solitude · 9-13 hours
- Open Canyon · 7-14 hours
- Signal Mountain Trail · 3-5 hours
- Surprise and Amphitheater Lakes · 5-7 hours
Frequently Asked Questions
September averages a daytime high near 66°F and an overnight low around 34°F at Grand Teton National Park, with about 1.6 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 6.4 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is very busy at Grand Teton National Park (about 1.9× the average month). Our best-time score rates it "Poor" at 43/100. September is our recommended month for this park.
The busiest month is July and the quietest is December. September sits at about 1.9× the park's average, or 16% of annual visitation.
A typical September sees about 535,000 recreation visits at Grand Teton National Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Grand Teton in September
Booking a September trip to Grand Teton National Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Grand Teton
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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Visiting Grand Teton in September?
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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.