Big Hole National Battlefield in September
September at Big Hole National Battlefield averages a daytime high near 68°F and an overnight low around 28°F, with about 1.1" of precipitation. Visitation runs about 1.8× the park's average month, which makes September a very busy month here.
- Average low
- 28°F
- Average high
- 68°F
Range across the year: 3°F to 78°F
- Precipitation
- 1.1 in
- Daylight
- 12.3 hours
Roughly 15% of the park's yearly visitors come in September: roughly 6,800 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 4th-busiest of the park's twelve months, sitting between the July peak (2.6×) and the December low (0.1×).
September is our recommended month at Big Hole: the lightest crowds of the park's good-weather months.
The daily average of about 48°F is cool, so layers and a shorter daylight window matter. These figures are 1991–2020 NOAA climate normals from the nearest station, about 9.6 miles from the park.
Because June, July and August together draw about 62% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 12.3 hours of daylight in September to explore — between the 8.5-hour midwinter low and the 15.5-hour summer high.
Park-wide, 2025 drew 40,938 recreation visits, down 9.5% from 45,211 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 77°F / 34°F | 2.6× Very busy | 41 Poor |
| September | 68°F / 28°F | 1.8× Very busy | 46 Fair |
| October | 53°F / 21°F | 0.8× Quiet | 54 Fair |
All twelve months at Big Hole, with the best time to visit.
Frequently Asked Questions
September averages a daytime high near 68°F and an overnight low around 28°F at Big Hole National Battlefield, with about 1.1 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 9.6 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is very busy at Big Hole National Battlefield (about 1.8× the average month). Our best-time score rates it "Fair" at 46/100. September is our recommended month for this park.
The busiest month is July and the quietest is December. September sits at about 1.8× the park's average, or 15% of annual visitation.
A typical September sees about 7,000 recreation visits at Big Hole National Battlefield, based on National Park Service monthly counts from 1979–2025.
Where to stay near Big Hole in September
Booking a September trip to Big Hole National Battlefield? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Big Hole
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.