Hawai'i Volcanoes National Park in September
In September, Hawai'i Volcanoes National Park averages a high of 73°F and a low of 55°F, with 6.0 inches of precipitation (rain plus melted snow). About 122,000 people visit, the 9th 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
- 73° / 55°F
- Precipitation
- 6.0in
- Snow
- 0in
- Daylight
- 12h 14m
- Visitors
- 122,000
- 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: Sea Mtn 12.15, HI at 80 ft averages a September high of 84°F and a low of 70°F.
Weather 1991–2020 averages at Hawaii Vol NP HQ 54, HI, 8.8 miles from the park's center, 3,971 ft. Second station lower down: Sea Mtn 12.15, HI, 80 ft, 21.3 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Haleakala National Park | 65° / 48° | 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: Hawai'i Volcanoes National Park on nps.gov
All twelve months at Hawai'i Volcanoes · National parks to visit in September