Fort Union Trading Post National Historic Site in August
August at Fort Union Trading Post National Historic Site averages a daytime high near 85°F and an overnight low around 55°F, with about 1.7" of precipitation. Visitation runs about 1.9× the park's average month, which makes August a very busy month here.
- Average low
- 55°F
- Average high
- 85°F
Range across the year: 4°F to 85°F
- Precipitation
- 1.7 in
- Daylight
- 14.1 hours
Roughly 16% of the park's yearly visitors come in August: roughly 2,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes August the 3rd-busiest of the park's twelve months, sitting between the June peak (3.6×) and the January low (0.1×).
On our Best Time to Visit score August rates 72/100 ("Good"). Our recommended month is September: the lightest crowds of the park's good-weather months.
The daily average of about 70°F is a comfortable range for hiking and being outdoors all day. These figures are 1991–2020 NOAA climate normals from the nearest station, about 16.8 miles from the park.
August falls inside the park's busiest stretch: June, July and August together pull about 65% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.
You'll have about 14.1 hours of daylight in August to explore — between the 8.2-hour midwinter low and the 15.8-hour summer high.
Park-wide, 2024 drew 12,028 recreation visits, down 7.1% from 12,942 in 2023.
Across the past decade overall visitation has eased about 23.2%, so August may feel a touch quieter than it once did.
How August compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| July | 85°F / 57°F | 2.2× Very busy | 69 Good |
| August | 85°F / 55°F | 1.9× Very busy | 72 Good |
| September | 75°F / 46°F | 1.4× Busy | 70 Good |
All twelve months at Fort Union Trading Post, with the best time to visit.
Things to do at Fort Union Trading Post in August
The National Park Service tags 4 Fort Union Trading Post activities for summer. Each links to the park's own page for it.
- Visit Fort Union's Trade House · 5-30 minutes
- Become a Jr. Ranger and Jr. Trader at Fort Union · 30-90 minutes
- Tour Fort Union Trading Post · 30-120 minutes
- Watch the Fort Union Trading Post Orientation Film · 9-9 minutes
Frequently Asked Questions
August averages a daytime high near 85°F and an overnight low around 55°F at Fort Union Trading Post National Historic Site, with about 1.7 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 16.8 miles from the park, so conditions inside the park can differ, especially at other elevations.
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" at 72/100. Our recommended month is September.
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.
A typical August sees about 2,000 recreation visits at Fort Union Trading Post National Historic Site, based on National Park Service monthly counts from 1979–2025.
Where to stay near Fort Union Trading Post in August
Booking a August trip to Fort Union Trading Post National Historic Site? Compare hotels, cabins and vacation rentals near the park with live August availability and prices.
Top-rated places to stay near Fort Union Trading Post
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See the full ranking of the best national parks to visit in August.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.