December weather forecast
Sanya, China

December ushers in the end of the year in Sanya with a continuation of the pleasant weather from November. Notably, rainfall drops further to a meager 11mm (0.43"), making December the driest month. The cool and dry weather creates the perfect backdrop for end-of-year celebrations. The lower temperatures make it a pleasant time for outdoor activities and beach sports. To conclude, December with its minimal rainfall and moderate temperatures, rounds off the weather cycle in Sanya, sealing it with a wonderfully pleasant stamp.

Temperature

Sanya experiences a transition to a still warm 26.6°C (79.9°F) in average high-temperatures with the arrival of December, not greatly differing from November's 28.5°C (83.3°F). In Sanya, the average temperature during the nights of December drops to a comfortable 19°C (66.2°F).

Rainfall

In Sanya, China, in December, it is raining for 3.7 days, with typically 11mm (0.43") of accumulated precipitation. In Sanya, during the entire year, the rain falls for 111.1 days and collects up to 1392mm (54.8") of precipitation.

Sea temperature

In Sanya, the average seawater temperature in December is 24.5°C (76.1°F).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.5°C (76.1°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

December has the shortest days of the year, with an average of 11h and 6min of daylight.
On the first day of December, sunrise is at 06:57 and sunset at 18:04. On the last day of the month, sunrise is at 07:13 and sunset at 18:16 CST.

Sunshine

In Sanya, the average sunshine in December is 6h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 8 during December leads to these advisories:
Take all necessary measures. Eyes and skin are at risk if left unprotected. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Caution! Sand and water surfaces escalate the UV intensity from the Sun.