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

The arrival of December in Sanya brings an average high-temperature of a still moderately hot 26.6°C (79.9°F), subtly diverging from November's 28.5°C (83.3°F). Throughout the month of December, Sanya reports a steady low-temperature average of 19°C (66.2°F).

Rainfall

In December, the rain falls for 3.7 days. Throughout December, 11mm (0.43") of precipitation is accumulated. Throughout the year, there are 111.1 rainfall days, and 1392mm (54.8") of precipitation is accumulated.

Sea temperature

In Sanya, in December, the average water temperature 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

The average sunshine in December is 6h.

UV index

With an average maximum UV index of 8, December is the month with the lowest UV index. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index, 8 during December, leads to the following recommendations:
Prioritize protection; rapid damage can occur to unprotected eyes and skin. 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. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Note! Reflective surfaces like sand and water heighten the UV radiation levels.