Sanya 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
Excellent
Best time to visit: November – March
What is the weather like in Sanya in December?
In December, Sanya 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 is scarce, with only about 4 hours a day. Rain is rare: about 3 days bring 24 mm in total. All in all, December is an excellent month for a holiday in Sanya.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 78 | 82 | 82 |
| Day | 27° | 24° | 24° |
| Night | 23° | 20° | 19° |
| Sea | 27° | 25° | 24° |
| Sun | 4 h | 4 h | 4 h |
| Rain days | 7 | 3 | 3 |
More details for December
- Daylight
- 11 h 3 min07:06 – 18:08
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 13 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+8Asia/Shanghai
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %8 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
Sanya in December: quick answers
Is Sanya hot in December?
Warm rather than hot: in December, daytime highs in Sanya average 24 °C and nights cool to about 20 °C.
Can you swim in Sanya in December?
Yes. In December the sea averages 25.0 °C – pleasant for swimming.
Does it rain much in Sanya in December?
Rain is rare: about 3 days bring 24 mm in total.
Sanya month by month
The whole year in SanyaAll destinations: ChinaWhere 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