Hilo weather in December
December in Hilo: warm, soaked, with clean air — a good time to visit.
#12 of 12 months in Hilo · #361 of 604 destinations to visit in December · comfort 66/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Hilo climate normals — December
| Daytime high | 24°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 388 mm / 15.3 in | ⛈ soaked |
| Rainy days | 26 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 19°C / 66°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 11 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 25 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Hilo?
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Hilo in December — FAQ
- Is December a good time to visit Hilo?
- December in Hilo: warm, soaked, with clean air — a good time to visit. It ranks #12 of 12 months for Hilo on SeasonMap's comfort score (66/100).
- What is the weather like in Hilo in December?
- In December, Hilo averages a daily high of 24.4°C and a low of 19.4°C, with about 388.1 mm of rain over roughly 26 rainy days.
- What is the air quality in Hilo in December?
- Hilo has a mean US Air Quality Index of about 25 in December.