Waco Mammoth National Monument in September
September at Waco Mammoth National Monument averages a daytime high near 89°F and an overnight low around 68°F, with about 3.2" of precipitation. Visitation runs about 0.7× the park's average month, which makes September a quiet month here.
- Average low
- 68°F
- Average high
- 89°F
Range across the year: 36°F to 95°F
- Precipitation
- 3.2 in
- Daylight
- 12.2 hours
Roughly 6% of the park's yearly visitors come in September: roughly 5,400 recreation visits in a typical year, based on National Park Service monthly counts from 2015 to 2025.
That makes September the 10th-busiest of the park's twelve months, sitting between the March peak (1.9×) and the January low (0.5×).
On our Best Time to Visit score September rates 63/100 ("Good"). Our recommended month is November: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 78°F is warm enough that midday heat is worth planning around. These figures are 1991–2020 NOAA climate normals from the nearest station, about 2.4 miles from the park.
Because June, July and August together draw about 28% 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 12.2 hours of daylight in September to explore — between the 9.9-hour midwinter low and the 14.1-hour summer high.
Park-wide, 2025 drew 91,678 recreation visits, down 18.1% from 111,961 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 95°F / 75°F | 0.8× Quiet | 42 Poor |
| September | 89°F / 68°F | 0.7× Quiet | 63 Good |
| October | 80°F / 57°F | 0.9× Average | 74 Good |
All twelve months at Waco Mammoth, with the best time to visit.
Things to do at Waco Mammoth in September
The National Park Service tags 6 Waco Mammoth activities for fall. Each links to the park's own page for it.
Frequently Asked Questions
September averages a daytime high near 89°F and an overnight low around 68°F at Waco Mammoth National Monument, with about 3.2 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 2.4 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is quiet at Waco Mammoth National Monument (about 0.7× the average month). Our best-time score rates it "Good" at 63/100. Our recommended month is November.
The busiest month is March and the quietest is January. September sits at about 0.7× the park's average, or 6% of annual visitation.
A typical September sees about 5,000 recreation visits at Waco Mammoth National Monument, based on National Park Service monthly counts from 2015–2025.
Where to stay near Waco Mammoth in September
Booking a September trip to Waco Mammoth National Monument? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Waco Mammoth
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 (2015–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.