Haleakala National Park weather in August
August in Haleakala National Park: nice, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Haleakala National Park · #138 of 604 destinations to visit in August · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Haleakala National Park climate normals — August
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 58 mm / 2.3 in | 🌦 some rain |
| Rainy days | 19 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 11.7 h/day | |
| Daylight | 12.8 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Haleakala National Park?
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Haleakala National Park in August — FAQ
- Is August a good time to visit Haleakala National Park?
- August in Haleakala National Park: nice, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Haleakala National Park on SeasonMap's comfort score (87/100).
- What is the weather like in Haleakala National Park in August?
- In August, Haleakala National Park averages a daily high of 17.1°C and a low of 13.2°C, with about 58.2 mm of rain over roughly 19.2 rainy days.
- What is the air quality in Haleakala National Park in August?
- Haleakala National Park has a mean US Air Quality Index of about 40 in August.