How Crowded Is Petrified Forest in September?
September is an average month at Petrified Forest National Park, running about 1.0× the park's average month — roughly 8% of the year's visitors come in September. That puts it between the June peak and the January low. Overall our best-time score rates September as "Good" for a visit. Typical September weather averages a high near 82°F and a low around 51°F, with about 1.1" of precipitation. You'll get about 12.2 hours of daylight to explore.
Frequently Asked Questions
September is average at Petrified Forest National Park (about 1.0× the average month). Our best-time score rates it "Good". The single best month overall is September.
The busiest month is June and the quietest is January. September sits at about 1.0× the park's average, or 8% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.