December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average sea temperature in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

The limestone rocks in Ha Long Bay, Vietnam, with cruise boats docked off the shores of the beautiful blue waters

Weather in December

December's weather in Ha Long signifies the onset of winter, bringing the year to a cool close. Alongside the festive spirits, expect to find minimum rainfall with only 25mm (0.98") projected for the month. As the temperatures drop significantly, the city's calm winter beauty unfolds. December's ambience allows visitors to experience the tranquility and peace of Ha Long. Despite the cold days, the city's alluring charm is in full bloom, rounding off a year full of remarkable climatic shifts.

Temperature

Ha Long's weather subtly changes with the onset of December, barely falling from a moderately hot 25.9°C (78.6°F) in November to an agreeable 21.5°C (70.7°F). Ha Long experiences an average low-temperature of 14.1°C (57.4°F) in the month of December.

Humidity

In December, the average relative humidity is 73%.

Rainfall

In Ha Long, in December, it is raining for 12.9 days, with typically 25mm (0.98") of accumulated precipitation. Throughout the year, there are 237.1 rainfall days, and 1472mm (57.95") of precipitation is accumulated.

Sea temperature

In Ha Long, the average seawater temperature in December is 21.6°C (70.9°F).
Note: Most individuals do not find swimming at 21.6°C (70.9°F) to be enjoyable. As the water temperature declines below 21°C (69.8°F), maintaining control over one's breathing becomes harder.

Daylight

With an average of 10h and 54min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 06:12 and sunset at 17:09. On the last day of December, sunrise is at 06:28 and sunset at 17:21 +07.

Sunshine

The average sunshine in December is 4.9h.

UV index

January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 4 in December interprets into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Heed this! UV intensity is much stronger when reflected off sand and water.

Updated: Jun 3, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in December?

In Ha Long, 21.5°C (70.7°F) is the average high-temperature and 14.1°C (57.4°F) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in October is estimated at 34°C (93.2°F).

What is the average humidity in December?

In Ha Long, the average relative humidity in December is 73%.

How many days does it rain in December?

In December, the rain falls for 12.9 days. Throughout December, 25mm (0.98") of precipitation is accumulated.

What is the sea temperature in December?

In Ha Long, in December, the average water temperature is 21.6°C (70.9°F). For swimming, a surface water temperature of 21.6°C (70.9°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?

The month with the shortest days is December, with an average of 10h and 54min of daylight.

What is the average length of the day in December?

The average day length in December is 10h and 53min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 06:12 and sunset at 17:09. On the last day of the month, sunrise is at 06:28 and sunset at 17:21 +07.

How long on average sun shines in December?

In December, the average sunshine duration is 4.9h.

When is the lowest UV index in Ha Long?

The months with the lowest UV index are January and December, with an average maximum UV index of 4.

What is the UV index intensity in December?

In December, the average daily maximum UV index in Ha Long is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

25.9°C 78.6°F

21.5°C 70.7°F

20.1°C 68.2°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.2km/h 3.9mph

6.1km/h 3.8mph

7.1km/h 4.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

14.2

12.9

15.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

15.5

11.6

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Ha Long, Vietnam

Average high temperature in December: 21.5°C

The warmest month (with the highest average high temperature) is June (34.1°C).
The month with the lowest average high temperature is January (20.1°C).

Average low temperature in December: 14.1°C

The month with the highest average low temperature is June (25.4°C).
The coldest month (with the lowest average low temperature) is January (13.7°C).

Average pressure in December
Ha Long, Vietnam

Average pressure in December: 1019.2mbar

The month with the highest atmospheric pressure is December (1019.2mbar).
The month with the lowest atmospheric pressure is June (1003.4mbar).

Average wind speed in December
Ha Long, Vietnam

Average wind speed in December: 5.3km/h

The windiest month (with the highest average wind speed) is March (8.6km/h).
The calmest months (with the lowest average wind speed) are August and September (5.2km/h).

Average humidity in December
Ha Long, Vietnam

Average humidity in December: 73%

The months with the highest relative humidity are August and September (83%).
The month with the lowest relative humidity is February (71%).

Average rainfall in December
Ha Long, Vietnam

Average rainfall in December: 25mm

The wettest month (with the highest rainfall) is August (317mm).
The driest month (with the least rainfall) is February (15mm).

Average rainfall days in December
Ha Long, Vietnam

Average rainfall days in December: 12.9 days

The month with the highest number of rainy days is July (28.3 days).
The month with the least rainy days is February (12.8 days).

Average sea temperature in December
Ha Long, Vietnam

Average sea temperature in December: 21.6°C

The best month for swimming (with the highest average sea temperature) is July (30.8°C).
The coldest months (with the lowest average sea temperature) are January and February (19.3°C).

Average daylight in December /
Average sunshine in December
Ha Long, Vietnam

Average daylight in December: 10h and 5min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

Average sunshine in December: 4h and 5min

The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in December
Ha Long, Vietnam

Average sunshine days in December: 15.5 days

The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is July (2.3 days).

Average UV index in December
Ha Long, Vietnam

Average UV index in December: 4

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

Average cloud cover in December
Ha Long, Vietnam

Average cloud cover in December: 52

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is June (Cloud cover 42).

Average visibility in December
Ha Long, Vietnam

Average visibility in December: 9km

The months with the highest visibility are January, February, March, April, May, June, October, November and December (9km).
The months with the lowest visibility are July, August and September (8km).

December weather forecast
Ha Long, Vietnam

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