How Crowded Is Mount Rainier in August?
August is a very busy month at Mount Rainier National Park, running about 2.9× the park's average month — roughly 24% of the year's visitors come in August. That puts it between the July peak and the February low. Overall our best-time score rates August as "Poor" for a visit. Typical August weather averages a high near 64°F and a low around 45°F, with about 1.6" of precipitation. You'll get about 14.0 hours of daylight to explore.
Frequently Asked Questions
August is very busy at Mount Rainier National Park (about 2.9× the average month). Our best-time score rates it "Poor". The single best month overall is May.
The busiest month is July and the quietest is February. August sits at about 2.9× the park's average, or 24% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.