How Crowded Is Fort Union Trading Post in August?
August is a very busy month at Fort Union Trading Post National Historic Site, running about 1.9× the park's average month — roughly 16% 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 "Good" for a visit. Typical August weather averages a high near 85°F and a low around 55°F, with about 1.7" of precipitation. You'll get about 14.1 hours of daylight to explore.
Frequently Asked Questions
August is very busy at Fort Union Trading Post National Historic Site (about 1.9× the average month). Our best-time score rates it "Good". The single best month overall is August.
The busiest month is June and the quietest is January. August sits at about 1.9× the park's average, or 16% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.