Hawaii Volcanoes National Park weather in May
May in Hawaii Volcanoes National Park: nice, soaked, with clean air — an excellent time to visit.
#8 of 12 months in Hawaii Volcanoes National Park · #335 of 604 destinations to visit in May · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Hawaii Volcanoes National Park climate normals — May
| Daytime high | 20°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 194 mm / 7.6 in | ⛈ soaked |
| Rainy days | 21 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 11.5 h/day | |
| Daylight | 13.1 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 26 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Hawaii Volcanoes National Park?
Loading map…
Hawaii Volcanoes National Park in May — FAQ
- Is May a good time to visit Hawaii Volcanoes National Park?
- May in Hawaii Volcanoes National Park: nice, soaked, with clean air — an excellent time to visit. It ranks #8 of 12 months for Hawaii Volcanoes National Park on SeasonMap's comfort score (80/100).
- What is the weather like in Hawaii Volcanoes National Park in May?
- In May, Hawaii Volcanoes National Park averages a daily high of 19.5°C and a low of 14.1°C, with about 194.3 mm of rain over roughly 21 rainy days.
- What is the air quality in Hawaii Volcanoes National Park in May?
- Hawaii Volcanoes National Park has a mean US Air Quality Index of about 26 in May.