Organ Pipe Cactus National Monument in September
September at Organ Pipe Cactus National Monument averages a daytime high near 99°F and an overnight low around 70°F, with about 0.8" of precipitation. Visitation runs about 0.7× the park's average month, which makes September a quiet month here.
- Average low
- 70°F
- Average high
- 99°F
Range across the year: 41°F to 104°F
- Precipitation
- 0.8 in
- Daylight
- 12.2 hours
Roughly 5% of the park's yearly visitors come in September: about 11,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 9th-busiest of the park's twelve months, sitting between the March peak (1.8×) and the July low (0.6×).
On our Best Time to Visit score September rates 45/100 ("Fair"). Our recommended month is November: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 85°F is hot, with afternoons near 99°F to plan the day around. These figures are 1991–2020 NOAA climate normals from the nearest station, about 6.5 miles from the park.
Because June, July and August together draw about 15% 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 174,623 recreation visits, down 4.4% from 182,612 in 2024.
Across the past decade overall visitation has eased about 28.3%, 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 | 103°F / 75°F | 0.6× Quiet | 48 Fair |
| September | 99°F / 70°F | 0.7× Quiet | 45 Fair |
| October | 90°F / 59°F | 0.8× Quiet | 62 Good |
All twelve months at Organ Pipe Cactus, with the best time to visit.
Things to do at Organ Pipe Cactus in September
The National Park Service tags 16 Organ Pipe Cactus activities for fall. Here are 8 of them. Each links to the park's own page for it.
- Hike the Estes Canyon/Bull Pasture Loop · 1-3 hours
- Become a Desert Ranger · 30-120 minutes
- Birding at Organ Pipe
- Drive the Ajo Mountain Loop · 2-5 hours
- Hike the Historic Old County Road! · 3-5 hours · reservation required
- Hike to Lost Cabin · 4-5 hours
- See Endangered Pupfish Along the Visitor Center Nature Trail · 15-30 minutes
- Stretch Your Legs on the Campground Perimeter Trail · 30 minutes
Frequently Asked Questions
September averages a daytime high near 99°F and an overnight low around 70°F at Organ Pipe Cactus National Monument, with about 0.8 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 6.5 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is quiet at Organ Pipe Cactus National Monument (about 0.7× the average month). Our best-time score rates it "Fair" at 45/100. Our recommended month is November.
The busiest month is March and the quietest is July. September sits at about 0.7× the park's average, or 5% of annual visitation.
A typical September sees about 11,000 recreation visits at Organ Pipe Cactus National Monument, based on National Park Service monthly counts from 1979–2025.
Where to stay near Organ Pipe Cactus in September
Booking a September trip to Organ Pipe Cactus National Monument? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Organ Pipe Cactus
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.