Glacier National Park in September
In September, Glacier National Park averages a high of 68°F and a low of 41°F, with 2.0 inches of precipitation (rain plus melted snow). About 569,000 people visit, the 3rd busiest of 12 (busy). Days are 12 hours 31 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 68° / 41°F
- Precipitation
- 2.0in
- Snow
- 0in
- Daylight
- 12h 31m
- Visitors
- 569,000
- Crowds
- Busy
September is one of the best months to visit: mild weather with busy crowds.
Weather 1991–2020 averages at W Glacier, MT, 13.3 miles from the park's center, 3,148 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Lake Roosevelt National Recreation Area | 73° / 40° | Moderate | Mild |
| Yellowstone National Park | 61° / 30° | Very busy | Mild |
| Ross Lake National Recreation Area | 70° / 50° | Busy | Mild |
| John D. Rockefeller, Jr., Memorial Parkway | 66° / 28° | Busy | Mild |
| North Cascades National Park | 71° / 50° | Busy | Mild |
Closures, reservations and alerts: Glacier National Park on nps.gov
All twelve months at Glacier · National parks to visit in September