Haleakala National Park in September
In September, Haleakala National Park averages a high of 65°F and a low of 48°F, with 2.5 inches of precipitation (rain plus melted snow). About 58,000 people visit, the 11th busiest of 12 (busy). Days are 12 hours 14 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 65° / 48°F
- Precipitation
- 2.5in
- Snow
- 0in
- Daylight
- 12h 14m
- Visitors
- 58,000
- Crowds
- Busy
September is one of the best months to visit: mild weather with busy crowds.
Higher or lower in the park, expect a different picture: Ohe'o 258.6, HI at 86 ft averages a September high of 83°F and a low of 72°F.
Weather 1991–2020 averages at Haleakala RS 338, HI, 8.5 miles from the park's center, 6,962 ft. Second station lower down: Ohe'o 258.6, HI, 86 ft, 6.3 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Hawai'i Volcanoes National Park | 73° / 55° | Busy | Mild |
| Pearl Harbor National Memorial | 88° / 75° | Busy | Hot |
| Point Reyes National Seashore | 66° / 51° | Very busy | Mild |
| Golden Gate National Recreation Area | 82° / 53° | Very busy | Hot |
| Fort Point National Historic Site | 70° / 56° | Very busy | Mild |
Closures, reservations and alerts: Haleakala National Park on nps.gov
All twelve months at Haleakala · National parks to visit in September