How Crowded Is Crater Lake in September?
September is a very busy month at Crater Lake National Park, running about 1.7× the park's average month — roughly 14% of the year's visitors come in September. That puts it between the July peak and the January low. Overall our best-time score rates September as "Fair" for a visit. Typical September weather averages a high near 63°F and a low around 37°F, with about 1.9" of precipitation and roughly 1.8" of snow. You'll get about 12.3 hours of daylight to explore.
Frequently Asked Questions
September is very busy at Crater Lake National Park (about 1.7× the average month). Our best-time score rates it "Fair". The single best month overall is August.
The busiest month is July and the quietest is January. September sits at about 1.7× the park's average, or 14% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.