December weather forecast
Sai Wan, Hong Kong

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Weather in December

December brings the year to a close with a mild wisp of winter in Sai Wan. The month sees a noticeable decrease in temperature and rainfall. Winter in Sai Wan is far from harsh, presenting a rather subtle, softer version of the season. The sunlit afternoons resonate with a cheerful buzz, despite the colder temperatures. The significant factor for December is the reduction in rainfall to a light 23mm (0.91"), setting an atmospheric stage for the festive season celebrations.

Temperature

During the shift to December, Sai Wan records a mild decrease in average high-temperature, moving from a moderately hot 23.9°C (75°F) in November to an enjoyable 19.6°C (67.3°F). Throughout December, Sai Wan observes a steady low-temperature average of 16.2°C (61.2°F), reflecting a minor dip from daytime highs.

Humidity

With an average relative humidity of 70%, December is the least humid month.

Rainfall

December is the month with the least rainfall. Rain falls for 11.2 days and accumulates 23mm (0.91") of precipitation.

Daylight

With an average of 10h and 48min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:46 and sunset at 17:38. On the last day of December, sunrise is at 07:02 and sunset at 17:50 HKT.

Sunshine

The average sunshine in December in Sai Wan is 5.4h.

UV index

In Sai Wan, the average daily maximum UV index in December is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 5 in December translates into these instructions:
Exercise prevention - Precautions against solar damage are endorsed. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What is the temperature in December in Sai Wan?

During December, Sai Wan experiences an average high-temperature of 19.6°C (67.3°F) and a low-temperature of 16.2°C (61.2°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in October is appraised at 29°C (84.2°F).

What is the least humid month in Sai Wan?

With an average relative humidity of 70%, December is the least humid month in Sai Wan, Hong Kong.

What is the average humidity in December in Sai Wan?

The average relative humidity in December is 70%.

What is the driest month in Sai Wan?

The month with the least rainfall in Sai Wan, Hong Kong, is December, when the rain falls for 11.2 days and typically collects 23mm (0.91") of precipitation.

How many days does it rain in December in Sai Wan?

In Sai Wan, Hong Kong, in December, during 11.2 rainfall days, 23mm (0.91") of precipitation is typically accumulated.

What is the month with the shortest days in Sai Wan?

The month with the shortest days is December, with an average of 10h and 48min of daylight.

How many hours of daylight does Sai Wan have in December?

The average day length in December is 10h and 48min.

What time are sunrise and sunset in December in Sai Wan?

On the first day of December, sunrise is at 06:46 and sunset at 17:38. On the last day of the month, sunrise is at 07:02 and sunset at 17:50 HKT.

How many hours of sunshine does Sai Wan have in December?

The average sunshine duration in December is 5.4h.

What is the UV index reading in December in Sai Wan?

In Sai Wan, Hong Kong, the average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.

Average temperature in December
Sai Wan, Hong Kong

Average temperature in December - Sai Wan, Hong Kong
  • Average high temperature in December: 19.6°C

The warmest month (with the highest average high temperature) is August (30.5°C).
The month with the lowest average high temperature is January (18.5°C).

  • Average low temperature in December: 16.2°C

The month with the highest average low temperature is August (27.7°C).
The coldest month (with the lowest average low temperature) is January (15°C).

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Average pressure in December
Sai Wan, Hong Kong

Average pressure in December - Sai Wan, Hong Kong
  • Average pressure in December: 1019.6mbar

The month with the highest atmospheric pressure is January (1020.3mbar).
The month with the lowest atmospheric pressure is August (1004.8mbar).

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Average wind speed in December
Sai Wan, Hong Kong

Average wind speed in December - Sai Wan, Hong Kong
  • Average wind speed in December: 16km/h

The windiest month (with the highest average wind speed) is December (16km/h).
The calmest month (with the lowest average wind speed) is August (12.4km/h).

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Average humidity in December
Sai Wan, Hong Kong

Average humidity in December - Sai Wan, Hong Kong
  • Average humidity in December: 70%

The month with the highest relative humidity is May (84%).
The month with the lowest relative humidity is December (70%).

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Average rainfall in December
Sai Wan, Hong Kong

Average rainfall in December - Sai Wan, Hong Kong
  • Average rainfall in December: 23mm

The wettest month (with the highest rainfall) is August (223mm).
The driest month (with the least rainfall) is December (23mm).

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Average rainfall days in December
Sai Wan, Hong Kong

Average rainfall days in December - Sai Wan, Hong Kong
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is July (26.8 days).
The month with the least rainy days is December (11.2 days).

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

Average daylight in December / Average sunshine in December - Sai Wan, Hong Kong
  • Average daylight in December: 10h and 5min

The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is March (Average sunshine: 5h and 18min).

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Average sunshine days in December
Sai Wan, Hong Kong

Average sunshine days in December - Sai Wan, Hong Kong
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is December (16.9 days).
The month with the least sunshine days is July (3.1 days).

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Average UV index in December
Sai Wan, Hong Kong

Average UV index in December - Sai Wan, Hong Kong
  • Average UV index in December: 5

The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).

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Average cloud cover in December
Sai Wan, Hong Kong

Average cloud cover in December - Sai Wan, Hong Kong
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 61).
The months with the least cloud cover are September and October (Cloud cover 35).

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Average visibility in December
Sai Wan, Hong Kong

Average visibility in December - Sai Wan, Hong Kong
  • Average visibility in December: 10km

The months with the highest visibility are September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July and August (9km).

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Sai Wan, Hong Kong

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