Mount Rainier National Park in May
In May, Mount Rainier National Park averages a high of 48°F and a low of 33°F, with 5.1 inches of precipitation (rain plus melted snow). About 93,000 people visit, the 6th busiest of 12 (quiet). Days are 15 hours 01 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 48° / 33°F
- Precipitation
- 5.1in
- Snow
- –in
- Daylight
- 15h 1m
- Visitors
- 93,000
- 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 May high of 60°F and a low of 37°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 May
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Fort Vancouver National Historic Site | 68° / 48° | Very busy | Mild |
| Olympic National Park | 63° / 43° | Busy | Mild |
| Ross Lake National Recreation Area | 65° / 45° | Moderate | Mild |
| North Cascades National Park | 67° / 46° | Quiet | Mild |
| Lake Roosevelt National Recreation Area | 65° / 39° | Moderate | Mild, wet |
Closures, reservations and alerts: Mount Rainier National Park on nps.gov
All twelve months at Mount Rainier · National parks to visit in May