How Crowded Is Rio Grande in September?
September is a very quiet month at Rio Grande Wild & Scenic River, running about 0.2× the park's average month — roughly 2% of the year's visitors come in September. That puts it between the March peak and the August low. Overall our best-time score rates September as "Excellent" for a visit. Typical September weather averages a high near 89°F and a low around 67°F, with about 1.1" of precipitation. You'll get about 12.2 hours of daylight to explore.
Frequently Asked Questions
September is very quiet at Rio Grande Wild & Scenic River (about 0.2× the average month). Our best-time score rates it "Excellent". The single best month overall is September.
The busiest month is March and the quietest is August. September sits at about 0.2× the park's average, or 2% of annual visitation.
Source: National Park Service Visitor Use Statistics (1985–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.