Olympic National Park in September
In September, Olympic National Park averages a high of 68°F and a low of 48°F, with 1.6 inches of precipitation (rain plus melted snow). About 481,000 people visit, the 3rd busiest of 12 (very busy). Days are 12 hours 30 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 68° / 48°F
- Precipitation
- 1.6in
- Snow
- 0in
- Daylight
- 12h 30m
- Visitors
- 481,000
- Crowds
- Very busy
Best months for weather and crowds instead: April (quiet), May (busy) and June (busy).
Weather 1991–2020 averages at Elwha RS, WA, 16.1 miles from the park's center, 360 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Mount Rainier National Park | 57° / 41° | Moderate | Mild |
| North Cascades National Park | 71° / 50° | Busy | Mild |
| Ross Lake National Recreation Area | 70° / 50° | Busy | Mild |
| Fort Vancouver National Historic Site | 76° / 52° | Moderate | Mild |
| Lake Roosevelt National Recreation Area | 73° / 40° | Moderate | Mild |
Closures, reservations and alerts: Olympic National Park on nps.gov
All twelve months at Olympic · National parks to visit in September