Ross Lake National Recreation Area in September
In September, Ross Lake National Recreation Area averages a high of 70°F and a low of 50°F, with 2.5 inches of precipitation (rain plus melted snow). About 127,000 people visit, the 4th 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
- 70° / 50°F
- Precipitation
- 2.5in
- Snow
- 0in
- Daylight
- 12h 31m
- Visitors
- 127,000
- Crowds
- Busy
Best months for weather and crowds instead: April (quiet), May (moderate) and August (moderate).
Weather 1991–2020 averages at Ross Dam, WA, 4.2 miles from the park's center, 1,236 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| North Cascades National Park | 71° / 50° | Busy | Mild |
| Olympic National Park | 68° / 48° | Very busy | Mild |
| Mount Rainier National Park | 57° / 41° | Moderate | Mild |
| Lake Roosevelt National Recreation Area | 73° / 40° | Moderate | Mild |
| Fort Vancouver National Historic Site | 76° / 52° | Moderate | Mild |
Closures, reservations and alerts: Ross Lake National Recreation Area on nps.gov
All twelve months at Ross Lake National Recreation Area · National parks to visit in September