How Crowded Is Black Canyon Of The Gunnison in September?
September is a very busy month at Black Canyon Of The Gunnison National Park, running about 1.8× the park's average month — roughly 15% 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 "Poor" for a visit. Typical September weather averages a high near 72°F and a low around 44°F, with about 2.1" of precipitation. You'll get about 12.2 hours of daylight to explore.
Frequently Asked Questions
September is very busy at Black Canyon Of The Gunnison National Park (about 1.8× the average month). Our best-time score rates it "Poor". The single best month overall is April.
The busiest month is July and the quietest is December. September sits at about 1.8× the park's average, or 15% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.