Hawaii Volcanoes National Park weather in September
September in Hawaii Volcanoes National Park: nice, rainy, with clean air — an excellent time to visit.
#5 of 12 months in Hawaii Volcanoes National Park · #243 of 604 destinations to visit in September · comfort 83/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Hawaii Volcanoes National Park climate normals — September
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 117 mm / 4.6 in | 🌧 rainy |
| Rainy days | 18 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 14°C / 58°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 12.2 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 19 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hawaii Volcanoes National Park in September — FAQ
- Is September a good time to visit Hawaii Volcanoes National Park?
- September in Hawaii Volcanoes National Park: nice, rainy, with clean air — an excellent time to visit. It ranks #5 of 12 months for Hawaii Volcanoes National Park on SeasonMap's comfort score (83/100).
- What is the weather like in Hawaii Volcanoes National Park in September?
- In September, Hawaii Volcanoes National Park averages a daily high of 21.3°C and a low of 15.6°C, with about 116.8 mm of rain over roughly 18.4 rainy days.
- What is the air quality in Hawaii Volcanoes National Park in September?
- Hawaii Volcanoes National Park has a mean US Air Quality Index of about 19 in September.