Haleakala National Park weather in January
January in Haleakala National Park: cool, rainy, with clean air — an excellent time to visit.
#8 of 12 months in Haleakala National Park · #111 of 604 destinations to visit in January · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Haleakala National Park climate normals — January
| Daytime high | 15°C / 58°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Feels like (high) | 12°C / 54°F | |
| Rainfall | 96 mm / 3.8 in | 🌧 rainy |
| Rainy days | 15 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 10°C / 49°F | |
| Sunshine | 9.6 h/day | |
| Daylight | 11 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 34 | 🍃 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 January — FAQ
- Is January a good time to visit Haleakala National Park?
- January in Haleakala National Park: cool, rainy, with clean air — an excellent time to visit. It ranks #8 of 12 months for Haleakala National Park on SeasonMap's comfort score (84/100).
- What is the weather like in Haleakala National Park in January?
- In January, Haleakala National Park averages a daily high of 14.5°C and a low of 11°C, with about 95.7 mm of rain over roughly 15.2 rainy days.
- What is the air quality in Haleakala National Park in January?
- Haleakala National Park has a mean US Air Quality Index of about 34 in January.