Hong Kong
Hong Kong
Long-term weather forecast
Long-term weather forecast

December weather forecast and Climate
Hong Kong, Hong Kong

A bird
A bird's eye view of the lit city of Hong Kong, in the Hong Kong Island
December is the least humid month of the year at 68% with mostly clear skies, and transitions to the mild winter with a gradual drop in temperatures. Average high temperatures are mild 20°C (68°F), while average low temperatures drop to a comfortable 15.6°C (60.1°F).
The sun is visible in its full splendor for 6 hours a day as the days become short and the nights are prone to cool temperatures. The winter sun, with an ultraviolet index of 7 suggests precautionary measures during outdoor explorations.
Be warned that early morning photography is a little tricky with the presence of fog, especially at high altitudes like the Victoria Peak for a spectacular view of the skyscrapers, the glittering harbor and the green terrain of the far-off New Territories.
Rain is of little consequence in December, but it never hurts to carry warm clothes and protective rain gear as Hong Kong weather is never truly dry.
  • The 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).

  • The 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).

  • The average humidity in December: 69%

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

  • The average rainfall in December: 26.8mm

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

  • The 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 lowest number of rainy days is December (4.5 days).

  • The 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).

  • The average daylight in December: 11h

Months with the longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, February, November and December (Average daylight: 11h).

  • The average sunshine in December: 5.6h

The month with most sunshine is July (Average sunshine: 6.8h).
The month with least sunshine is March (Average sunshine: 2.9h).

  • The average UV index in December: 7

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