Mount Rainier National Park in August
Mount Rainier National Park · crowd + weather almanac
August crowd level
busiest stretch
about 371,000 visits in a
typical August
The 2nd-busiest month of the year ·
median of 2016–2025 official NPS counts
August is the 2nd-busiest month of the year at Mount Rainier National Park: about 371,000 recreation visits in a typical August (24% of the year's traffic, and 98% of what the peak month, July, sees). This is high season — the park is at or near its busiest. Weather-wise, August days at the Rainier Paradise Rs, WA station typically top out around 64°F with nights near 45°F, and about 1.6 inches of precipitation falls over the month.
- Typical August: 370,623 recreation visits (median 2016–2025); the range across those years ran 313,699 (2016) to 430,922 (2025).
- Busier than 10 of the other 11 months.
- 1991–2020 August normals at Rainier Paradise Rs, WA: high 64°F, low 45°F, 1.64 in precipitation.
- Similar daytime temperatures, thinner crowds: September typically runs 57°F days with about 47% fewer visits (196,000 vs 371,000).
August weather (1991–2020 normals)
| Typical daytime high | 64°F |
|---|---|
| Typical overnight low | 45°F |
| Precipitation (monthly normal) | 1.64 in |
| Measured at | Rainier Paradise Rs, WA (USC00456898), 0.4 mi from the park reference point, elev. 5,427 ft |
Every month at Mount Rainier
| Month | Typical visits | Crowds | High / Low | Precip |
|---|---|---|---|---|
| January | 23,775 | quietest stretch | 34°F / 24°F | 17.2 in |
| February | 16,497 | quietest stretch | 34°F / 23°F | 12.9 in |
| March | 27,922 | quietest stretch | 36°F / 24°F | 13.2 in |
| April | 29,516 | quietest stretch | 40°F / 26°F | 8.3 in |
| May | 94,992 | quiet | 48°F / 33°F | 5.1 in |
| June | 219,463 | moderate | 54°F / 37°F | 3.8 in |
| July | 377,222 | busiest stretch | 62°F / 44°F | 1.4 in |
| August | 370,623 | busiest stretch | 64°F / 45°F | 1.6 in |
| September | 195,791 | moderate | 57°F / 41°F | 4.4 in |
| October | 105,185 | quiet | 46°F / 33°F | 11.2 in |
| November | 33,377 | quietest stretch | 37°F / 26°F | 18.2 in |
| December | 25,467 | quietest stretch | 33°F / 22°F | 18.9 in |