Devils Tower National Monument in September
September at Devils Tower National Monument averages a daytime high near 75°F and an overnight low around 42°F, with about 1.3" of precipitation. Visitation runs about 1.6× the park's average month, which makes September a busy month here.
- Average low
- 42°F
- Average high
- 75°F
Range across the year: 8°F to 85°F
- Precipitation
- 1.3 in
- Daylight
- 12.3 hours
Roughly 13% of the park's yearly visitors come in September: about 65,000 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 (2.9×) and the January low (0.1×).
September is our recommended month at Devils Tower: the lightest crowds of the park's good-weather months.
The daily average of about 58°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 0.5 miles from the park.
Because June, July and August together draw about 67% 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 8.6-hour midwinter low and the 15.4-hour summer high.
Park-wide, 2025 drew 515,303 recreation visits, down 4.7% from 540,890 in 2024.
Across the past decade overall visitation has risen about 8.6%, so a September visit is likely to feel busier than it did a few years ago.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 85°F / 52°F | 2.7× Very busy | 56 Fair |
| September | 75°F / 42°F | 1.6× Busy | 61 Good |
| October | 60°F / 30°F | 0.6× Quiet | 54 Fair |
All twelve months at Devils Tower, with the best time to visit.
Things to do at Devils Tower in September
The National Park Service tags 8 Devils Tower activities for fall. Each links to the park's own page for it.
- Eat Lunch at the Devils Tower Picnic Area · 1-2 hours
- Hike Joyner Ridge Trail · 1-2 hours
- Hike South Side Trail · 0-30 minutes
- Hike the Red Beds Loop Trail · 2-3 hours
- Hike Valley View Trail · 0-30 minutes
- Stargaze at Joyner Ridge
- Walk the Tower Trail Loop · 40 minutes
- Watch for Wildlife at Prairie Dog Town
Frequently Asked Questions
September averages a daytime high near 75°F and an overnight low around 42°F at Devils Tower National Monument, with about 1.3 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 0.5 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is busy at Devils Tower National Monument (about 1.6× the average month). Our best-time score rates it "Good" at 61/100. September is our recommended month for this park.
The busiest month is July and the quietest is January. September sits at about 1.6× the park's average, or 13% of annual visitation.
A typical September sees about 65,000 recreation visits at Devils Tower National Monument, based on National Park Service monthly counts from 1979–2025.
Where to stay near Devils Tower in September
Booking a September trip to Devils Tower National Monument? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Devils Tower
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Visiting Devils Tower in September?
Get crowd forecasts and lodging deals for Devils Tower by email. No spam, unsubscribe anytime.
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.