Haleakalā National Park in September
September at Haleakalā National Park averages a daytime high near 65°F and an overnight low around 48°F, with about 2.5" of precipitation. Visitation runs about 1× the park's average month, which makes September an average month here.
- Average low
- 48°F
- Average high
- 65°F
Range across the year: 43°F to 66°F
- Precipitation
- 2.5 in
- Daylight
- 12.1 hours
Roughly 8% of the park's yearly visitors come in September: about 82,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 8th-busiest of the park's twelve months, sitting between the July peak (1.1×) and the November low (0.9×).
September is our recommended month at Haleakalā: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 56°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 6.8 miles from the park.
Because June, July and August together draw about 27% 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 12.1 hours of daylight in September to explore — between the 10.7-hour midwinter low and the 13.3-hour summer high.
Park-wide, 2025 drew 853,711 recreation visits, up 16.6% from 732,477 in 2024.
Across the past decade overall visitation has eased about 23.3%, 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 | 66°F / 49°F | 1.0× Average | 56 Fair |
| September | 65°F / 48°F | 1.0× Average | 58 Fair |
| October | 64°F / 48°F | 0.9× Average | 68 Good |
All twelve months at Haleakalā, with the best time to visit.
Things to do at Haleakalā in September
The National Park Service tags 8 Haleakalā activities for fall. Each links to the park's own page for it.
- Become a Haleakalā Junior Ranger · 1-2 hours
- Enjoy the Sunrise · 2-4 hours · reservation required
- Moderate Hike into Haleakalā's Crater · 1-2 hours
- Moderate Hike to the Crater Edge · 1-2 hours
- Moderate Hike up to the Bamboo Forest · 1 hour
- Short Hike to Leleiwi Overlook · 30-60 minutes
- Short Hike to Makahiku Falls · 1 hour
- Strenuous Hike Across the Crater Floor · 7-9 hours
Frequently Asked Questions
September averages a daytime high near 65°F and an overnight low around 48°F at Haleakalā National Park, with about 2.5 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 6.8 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at Haleakalā National Park (about 1.0× the average month). Our best-time score rates it "Fair" at 58/100. September is our recommended month for this park.
The busiest month is July and the quietest is November. September sits at about 1.0× the park's average, or 8% of annual visitation.
A typical September sees about 82,000 recreation visits at Haleakalā National Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Haleakalā in September
Booking a September trip to Haleakalā National Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Haleakalā
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.