Mount Rainier National Park in December
In December, Mount Rainier National Park averages a high of 33°F and a low of 22°F, with 18.9 inches of precipitation (rain plus melted snow). About 22,000 people visit, the 10th busiest of 12 (quiet). Days are 8 hours 33 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 33° / 22°F
- Precipitation
- 18.9in
- Snow
- –in
- Daylight
- 8h 33m
- Visitors
- 22,000
- Crowds
- Quiet
Best months for weather and crowds instead: July (very busy), August (very busy) and September (moderate).
Higher or lower in the park, expect a different picture: Longmire Rainier Nps, WA at 2,762 ft averages a December high of 36°F and a low of 25°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 December
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Fort Vancouver National Historic Site | 47° / 35° | Quiet | Cool |
| Olympic National Park | 41° / 33° | Quiet | Cool |
| Ross Lake National Recreation Area | 38° / 31° | Few or no visits | Cold |
| North Cascades National Park | 40° / 33° | Few or no visits | Cold |
| Lake Roosevelt National Recreation Area | 31° / 19° | Quiet | Cold |
Closures, reservations and alerts: Mount Rainier National Park on nps.gov
All twelve months at Mount Rainier · National parks to visit in December