December weather forecast
Macau, China

December marks the end of the year with the winter season stepping in. Macau, China experiences a stark contrast in temperature from a high of 20.1°C (68.2°F) to a low of 14°C (57.2°F). Despite being the month with the least amount of rainfall, the relative humidity remains substantial. With shorter daylight hours and cooler weather, it’s time to bundle up and welcome the winter chill.

Temperature

The onset of December aligns with a soft reduction in the average high-temperature, gently falling from a moderately hot 24.1°C (75.4°F) in November to a pleasant 20.1°C (68.2°F). An average nighttime temperature of 14°C (57.2°F) is recorded in Macau during December.

Humidity

December is the least humid month in Macau, with an average relative humidity of 68.5%.

Rainfall

In December, the rain falls for 4.5 days. Throughout December, 30mm (1.18") of precipitation is accumulated. Throughout the year, there are 130.2 rainfall days, and 2058mm (81.02") of precipitation is accumulated.

Sea temperature

In Macau, the average seawater temperature in December is 20.9°C (69.6°F).
Note: The majority of people find swimming in 20.9°C (69.6°F) unenjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing becomes more challenging to control.

Daylight

The month with the shortest days in Macau is December, with an average of 10h and 48min of daylight.
On the first day of December, sunrise is at 06:48 and sunset at 17:41. On the last day of the month, sunrise is at 07:04 and sunset at 17:52 CST.

Sunshine

The average sunshine in December is 5.1h.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 7 translates into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.