December weather forecast
Hong Kong, Hong Kong

The lit city of Hong Kong, on the Hong Kong Island
The lit city of Hong Kong, on the Hong Kong Island

Weather in December

December, the first month of the winter in Hong Kong, is still a pleasant month, with an average temperature varying between 15.9°C (60.6°F) and 20.2°C (68.4°F).

Temperature

In December, the average high-temperature slightly decreases from a warm 24.1°C (75.4°F) in November to an agreeable 20.2°C (68.4°F). In December, the average low-temperature is 15.9°C (60.6°F).

Humidity

With an average relative humidity of 69%, December is the least humid month.

Rainfall

In Hong Kong, it is raining for 4.5 days, with typically 26.8mm (1.06") of accumulated precipitation. In Hong Kong, Hong Kong, during the entire year, the rain falls for 137.8 days and collects up to 2398.4mm (94.43") of precipitation.

Sea temperature

In December, the average sea temperature is 21°C (69.8°F).
Note: For most, swimming in 21°C (69.8°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

With an average of 10h and 48min of daylight, December has the shortest days of the year in Hong Kong.
On the first day of the month, sunrise is at 06:45 and sunset at 17:38. On the last day of December, sunrise is at 07:02 and sunset at 17:49 HKT.

Sunshine

In Hong Kong, the average sunshine in December is 5.6h.

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 of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 7 in December transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the least humid month in Hong Kong?

The least humid month in Hong Kong is December, with an average relative humidity of 69%.

What is the average humidity in December in Hong Kong?

In December, the average relative humidity in Hong Kong, Hong Kong, is 69%.

How much does it rain in Hong Kong in December?

In December, in Hong Kong, the rain falls for 4.5 days. Throughout December, 26.8mm (1.06") of precipitation is accumulated.

What is the sea water temperature in December in Hong Kong?

In December, the average sea temperature in Hong Kong is 21°C (69.8°F). For swimming, a surface water temperature of 21°C (69.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the month with the shortest days in Hong Kong?

December has the shortest days of the year in Hong Kong, with an average of 10h and 48min of daylight.

What is the average length of the day in December in Hong Kong?

In December, the average day length in Hong Kong is 10h and 48min.

What time are sunrise and sunset in December in Hong Kong?

On the first day of December in Hong Kong, sunrise is at 06:45 and sunset at 17:38. On the last day of the month, sunrise is at 07:02 and sunset at 17:49 HKT.

How long on average sun shines in December in Hong Kong?

The average sunshine duration in December in Hong Kong, Hong Kong, is 5.6h.

What are the months with the lowest UV index in Hong Kong?

The months with the lowest UV index are January, November and December, with an average maximum UV index of 7.

What is the UV index intensity in December in Hong Kong?

In December, the average daily maximum UV index in Hong Kong, Hong Kong, is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average UV index

Average temperature in December
Hong Kong, Hong Kong

Average temperature in December - Hong Kong, Hong Kong
  • Average high temperature in December: 20.2°C

The warmest month (with the highest average high temperature) is July (31.4°C).
The month with the lowest average high temperature is January (18.6°C).

  • Average low temperature in December: 15.9°C

The month with the highest average low temperature is July (26.8°C).
The coldest month (with the lowest average low temperature) is January (14.5°C).

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Average humidity in December
Hong Kong, Hong Kong

Average humidity in December - Hong Kong, Hong Kong
  • Average humidity in December: 69%

The months with the highest relative humidity are April and May (83%).
The month with the lowest relative humidity is December (69%).

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Average rainfall in December
Hong Kong, Hong Kong

Average rainfall in December - Hong Kong, Hong Kong
  • Average rainfall in December: 26.8mm

The wettest month (with the highest rainfall) is June (456.1mm).
The driest month (with the least rainfall) is January (24.7mm).

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Average rainfall days in December
Hong Kong, Hong Kong

Average rainfall days in December - Hong Kong, Hong Kong
  • Average rainfall days in December: 4.5 days

The month with the highest number of rainy days is June (19.1 days).
The month with the least rainy days is December (4.5 days).

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Average sea temperature in December
Hong Kong, Hong Kong

Average sea temperature in December - Hong Kong, Hong Kong
  • Average sea temperature in December: 21°C

The best month for swimming (with the highest average sea temperature) is July (29.1°C).
The coldest month (with the lowest average sea temperature) is February (18.9°C).

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Average daylight in December /
Average sunshine in December
Hong Kong, Hong Kong

Average daylight in December / Average sunshine in December - Hong Kong, Hong Kong
  • Average daylight in December: 10h and 48min

The month with the longest days is June (Average daylight: 13h and 29min).
The month with the shortest days is December (Average daylight: 10h and 48min).

  • Average sunshine in December: 5h and 36min

The month with the most sunshine is July (Average sunshine: 6h and 48min).
The month with the least sunshine is March (Average sunshine: 2h and 54min).

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Average UV index in December
Hong Kong, Hong Kong

Average UV index in December - Hong Kong, Hong Kong
  • Average UV index in December: 7

The months with the highest UV index are April, May, June, July and August (UV index 12).
The months with the lowest UV index are January, November and December (UV index 7).

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