Vientiane
Laos
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Vientiane, Laos

Water geysers around the memorial Patuxay Monument in Vientiane, Laos
Water geysers around the memorial Patuxay Monument in Vientiane, Laos
The first month of the winter, December, is still a warm month in Vientiane, Laos, with average temperature ranging between min 16.7°C (62.1°F) and max 28.1°C (82.6°F).

Temperature

With an average high-temperature of 28.1°C (82.6°F) and an average low-temperature of 16.7°C (62.1°F), December is the coldest month.

Heat index

In December, the average heat index is calculated to a tropical 30.9°C (87.6°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, metabolic differences, wind, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in December is 70%.

Rainfall

The month with the least rainfall in Vientiane is December when the rain falls for 1 days and typically collects 2.5mm (0.1") of precipitation.

Daylight

December has the shortest days of the year, with an average of 11.1h of daylight.

Sunshine

With an average of 8.3h of sunshine, December has the most sunshine of the year in Vientiane.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 8. A UV Index estimate of 8 to 10 represents a very high threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 8 transform into the following instructions:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.

What is the coldest month in Vientiane?

The coldest month is December, with an average high-temperature of 28.1°C (82.6°F) and an average low-temperature of 16.7°C (62.1°F).

What is the temperature in December in Vientiane?

In December, the average high-temperature is 28.1°C (82.6°F), and the average low-temperature is 16.7°C (62.1°F). In December, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, is appraised at 30.9°C (87.6°F).

What is the average humidity in December in Vientiane?

In Vientiane, the average relative humidity in December is 70%.

How much does it rain in Vientiane in December?

In Vientiane, Laos, during December, the rain falls for 1 days and regularly aggregates up to 2.5mm (0.1") of precipitation.

What is the driest month in Vientiane?

December is the month with the least rainfall. Rain falls for 1 days and accumulates 2.5mm (0.1") of precipitation.

What is the month with the shortest days in Vientiane?

With an average of 11.1h of daylight, December has the shortest days of the year in Vientiane, Laos.

What is the average length of the day in December in Vientiane?

In December, the average length of the day is 11.1h.

What month has the most sunshine in Vientiane?

With an average of 8.3h of sunshine, December has the most sunshine of the year in Vientiane, Laos.

How many hours of sunshine does Vientiane have in December?

In December, the average sunshine is 8.3h.

When is the lowest UV index in Vientiane?

With an average maximum UV index of 8, December is the month with the lowest UV index.

What is the UV index intensity in December in Vientiane?

The average daily maximum UV index in December in Vientiane, Laos, is 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Vientiane, Laos
  • Average high temperature in December: 28.1°C

The warmest month (with the highest average high temperature) is April (34.3°C).
The month with the lowest average high temperature is December (28.1°C).

  • Average low temperature in December: 16.7°C

The month with the highest average low temperature is June (24.9°C).
The coldest month (with the lowest average low temperature) is January (16.4°C).

Average humidity in December - Vientiane, Laos
  • Average humidity in December: 70%

The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is March (66%).

Average rainfall in December - Vientiane, Laos
  • Average rainfall in December: 2.5mm

The wettest month (with the highest rainfall) is August (334.6mm).
The driest month (with the lowest rainfall) is December (2.5mm).

Average rainfall days in December - Vientiane, Laos
  • Average rainfall days in December: 1 days

The month with the highest number of rainy days is August (21 days).
Months with the lowest number of rainy days are January and December (1 days).

Average daylight in December / Average sunshine in December - Vientiane, Laos
  • Average daylight in December: 11.1h

The month with the longest days is June (Average daylight: 13.2h).
The month with shortest days is December (Average daylight: 11.1h).

  • Average sunshine in December: 8.3h

The month with most sunshine is December (Average sunshine: 8.3h).
The month with least sunshine is August (Average sunshine: 4.4h).

Average UV index in December - Vientiane, Laos
  • Average UV index in December: 8

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).