Hilo, Hawaii weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Good
Best time to visit: January – December
What is the weather like in Hilo, Hawaii in December?
In December, Hilo, Hawaii is warm: daytime highs average 24 °C, and nights cool down to about 20 °C. The sea averages 25.0 °C – pleasant for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 20 days, totalling 153 mm. The air is often humid and muggy. All in all, December is a good month for a holiday in Hilo, Hawaii.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 62 | 62 | 70 |
| Day | 25° | 24° | 24° |
| Night | 21° | 20° | 19° |
| Sea | 26° | 25° | 25° |
| Sun | 7 h | 7 h | 7 h |
| Rain days | 19 | 20 | 15 |
More details for December
- Daylight
- 10 h 57 min06:47 – 17:44
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 18 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 58 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−10Pacific/Honolulu
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %60 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in December
- Swimwear
- Sunscreen
- Insect repellent
- Rain jacket or umbrella
Hilo, Hawaii in December: quick answers
Is Hilo, Hawaii hot in December?
Warm rather than hot: in December, daytime highs in Hilo, Hawaii average 24 °C and nights cool to about 20 °C.
Can you swim in Hilo, Hawaii in December?
Yes. In December the sea averages 25.0 °C – pleasant for swimming.
Does it rain much in Hilo, Hawaii in December?
It rains often – on about 20 days, adding up to 153 mm.
Hilo, Hawaii month by month
The whole year in Hilo, HawaiiAll destinations: USAHawaii weather in DecemberWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences