How Crowded Is Great Sand Dunes in August?
August is a very busy month at Great Sand Dunes National Park & Preserve, running about 1.8× the park's average month — roughly 15% of the year's visitors come in August. That puts it between the June peak and the January low. Overall our best-time score rates August as "Fair" for a visit. Typical August weather averages a high near 78°F and a low around 50°F, with about 1.9" of precipitation. You'll get about 13.5 hours of daylight to explore.
Frequently Asked Questions
August is very busy at Great Sand Dunes National Park & Preserve (about 1.8× the average month). Our best-time score rates it "Fair". The single best month overall is September.
The busiest month is June and the quietest is January. August 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.