Jewel Cave National Monument in September
September at Jewel Cave National Monument averages a daytime high near 74°F and an overnight low around 46°F, with about 1.2" of precipitation. Visitation runs about 1.7× the park's average month, which makes September a very busy month here.
- Average low
- 46°F
- Average high
- 74°F
Range across the year: 11°F to 85°F
- Precipitation
- 1.2 in
- Daylight
- 12.3 hours
Roughly 14% of the park's yearly visitors come in September: about 16,000 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 (3.5×) and the January low (0×).
September is our recommended month at Jewel Cave: the lightest crowds of the park's good-weather months.
The daily average of about 60°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 8.6 miles from the park.
Because June, July and August together draw about 71% 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 8.7-hour midwinter low and the 15.2-hour summer high.
Park-wide, 2024 drew 145,332 recreation visits, up 19.6% from 121,536 in 2023.
Across the past decade overall visitation has eased about 20.1%, so September may feel a touch quieter than it once did.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 84°F / 56°F | 2.6× Very busy | 62 Good |
| September | 74°F / 46°F | 1.6× Very busy | 65 Good |
| October | 59°F / 32°F | 0.4× Very quiet | 58 Fair |
All twelve months at Jewel Cave, with the best time to visit.
Things to do at Jewel Cave in September
The National Park Service tags 5 Jewel Cave activities for fall. Each links to the park's own page for it.
- Wildflower Viewing
- Guided Cave Tours · reservation required
- Hiking Trails
- Historic Area
- Wildlife Viewing
Frequently Asked Questions
September averages a daytime high near 74°F and an overnight low around 46°F at Jewel Cave National Monument, with about 1.2 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 8.6 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is very busy at Jewel Cave National Monument (about 1.6× the average month). Our best-time score rates it "Good" at 65/100. 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 14% of annual visitation.
A typical September sees about 16,000 recreation visits at Jewel Cave National Monument, based on National Park Service monthly counts from 1979–2025.
Where to stay near Jewel Cave in September
Booking a September trip to Jewel Cave National Monument? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Jewel Cave
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.