How Crowded Is Great Basin in September?
September is a very busy month at Great Basin National Park, running about 2.1× the park's average month — roughly 17% of the year's visitors come in September. That puts it between the July peak and the December low. Overall our best-time score rates September as "Fair" for a visit. Typical September weather averages a high near 73°F and a low around 48°F, with about 1.1" of precipitation. You'll get about 12.2 hours of daylight to explore.
Frequently Asked Questions
September is very busy at Great Basin National Park (about 2.1× 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 December. September sits at about 2.1× the park's average, or 17% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.