Haleakala National Park weather in December
December in Haleakala National Park: cool, rainy, with clean air — a great time to visit.
#12 of 12 months in Haleakala National Park · #169 of 604 destinations to visit in December · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Haleakala National Park climate normals — December
| Daytime high | 15°C / 59°F | 🙂 cool |
|---|---|---|
| Nighttime low | 12°C / 53°F | |
| Feels like (high) | 12°C / 54°F | |
| Rainfall | 125 mm / 4.9 in | 🌧 rainy |
| Rainy days | 23 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 10.9 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 35 | 🍃 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 December — FAQ
- Is December a good time to visit Haleakala National Park?
- December in Haleakala National Park: cool, rainy, with clean air — a great time to visit. It ranks #12 of 12 months for Haleakala National Park on SeasonMap's comfort score (79/100).
- What is the weather like in Haleakala National Park in December?
- In December, Haleakala National Park averages a daily high of 14.8°C and a low of 11.5°C, with about 125.2 mm of rain over roughly 23 rainy days.
- What is the air quality in Haleakala National Park in December?
- Haleakala National Park has a mean US Air Quality Index of about 35 in December.