Grand Teton National Park in September
In September, Grand Teton National Park averages a high of 66°F and a low of 34°F, with 1.6 inches of precipitation (rain plus melted snow). About 600,000 people visit, the 4th busiest of 12 (busy). Days are 12 hours 27 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 66° / 34°F
- Precipitation
- 1.6in
- Snow
- 0.4in
- Daylight
- 12h 27m
- Visitors
- 600,000
- Crowds
- Busy
September is one of the best months to visit: mild weather with busy crowds.
Weather 1991–2020 averages at Moran 5WNW, WY, 5.3 miles from the park's center, 6,805 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| John D. Rockefeller, Jr., Memorial Parkway | 66° / 28° | Busy | Mild |
| Yellowstone National Park | 61° / 30° | Very busy | Mild |
| Rocky Mountain National Park | 68° / 32° | Busy | Mild, wet |
| Arches National Park | 87° / 58° | Very busy | Hot |
| Mount Rushmore National Memorial | 69° / 50° | Moderate | Mild |
Closures, reservations and alerts: Grand Teton National Park on nps.gov
All twelve months at Grand Teton · National parks to visit in September