Mount Rainier National Park in August
In August, Mount Rainier National Park averages a high of 64°F and a low of 45°F, with 1.6 inches of precipitation (rain plus melted snow). About 404,000 people visit, the 2nd busiest of 12 (very busy). Days are 14 hours 13 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 64° / 45°F
- Precipitation
- 1.6in
- Snow
- –in
- Daylight
- 14h 13m
- Visitors
- 404,000
- Crowds
- Very busy
August is one of the best months to visit: mild weather with very busy crowds.
Higher or lower in the park, expect a different picture: Longmire Rainier Nps, WA at 2,762 ft averages a August high of 76°F and a low of 46°F.
Weather 1991–2020 averages at Rainier Paradise RS, WA, 5.1 miles from the park's center, 5,427 ft. Second station lower down: Longmire Rainier Nps, WA, 2,762 ft, 8.8 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in August
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Fort Vancouver National Historic Site | 82° / 57° | Busy | Hot |
| Olympic National Park | 75° / 52° | Very busy | Mild |
| Ross Lake National Recreation Area | 79° / 56° | Moderate | Mild |
| North Cascades National Park | 79° / 54° | Busy | Mild |
| Lake Roosevelt National Recreation Area | 83° / 48° | Very busy | Hot |
Closures, reservations and alerts: Mount Rainier National Park on nps.gov
All twelve months at Mount Rainier · National parks to visit in August