Weather in Sanya in December 2025
- December is usually the driest month of the year in Sanya
Average weather
Average temperature in Sanya in December
Going from a maximum of +30°C during the day to a minimum of +15°C during the night, the temperature in December averages around +25°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +26°C to +26°C.
Is Sanya warm or cold in December?
Sanya is typically warm in December.
Maximum temperatures go down compared to the previous month from +27°C to +24°C. The minimum temperature also goes down from +21°C to +18°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
December is one of the coolest months in Sanya, here is the comparison with other months:
Climate in Sanya in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +27°C | +24°C | +24°C | ||||
| Min. temperature | ||||||
| +13°C | +9°C | +8°C | ||||
| Max. temperature | ||||||
| +33°C | +33°C | +31°C | ||||
| Rainfall | ||||||
| 51 mm | 20 mm | 10 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 77% | 75% | 78% | ||||
| Air pressure | ||||||
| 1014 HPa | 1016 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 7 | 7 | 5 | ||||
| Cloudy days | ||||||
| 12 | 18 | 20 | ||||
| Rainy days | ||||||
| 12 | 6 | 6 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December often has better weather than November. It’s getting colder in December. From +27°C in the day, the average maximum temperature lowers to +24°C. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 51 mm to 20 mm. It feels drier, as humidity decreases from 77% to 75%. The average wind speed doesn’t change much during December, staying around 3 m/s. The amount of sunny days stay about the same, averaging 7 sunny days during the month.
January brings much the same weather, it remains good.
Wind
The average wind speed is 4 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Sanya is gradually decreasing during December, going from 7 m/s to 2 m/s over the course of the month.
Rain
How was the weather last December in Sanya?
Climate Change over Years
The climate in Sanya in December has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+26°C) and the highest in 2019 (+31°C). The driest year was 2004 with only 1034 mm of rainfall, and the wettest year was 2013 with 1941 mm.
FAQ
Is December a good time to visit Sanya?
Can you sunbathe in Sanya in December?
Is Sanya rainy in December?
Is it sunny in Sanya in December?
Other cities in China
Monthly weather in Sanya
Source of the data
For this page, we’ve looked at the typical weather in Sanya, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
