Monthly 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

Weather in January

January, like December, in Vientiane, Laos, is another warm winter month, with average temperature fluctuating between 16.4°C (61.5°F) and 28.4°C (83.1°F). In Vientiane, the average high-temperature is practically the same as in December - a still moderately hot 28.4°C (83.1°F). Weather in January »

Weather in February

February, the last month of the winter, in Vientiane, is a hot month, with average temperature ranging between min 18.5°C (65.3°F) and max 30.3°C (86.5°F). In February, the average high-temperature is relatively the same as in January - a tropical 30.3°C (86.5°F). Weather in February »

Weather in March

The first month of the spring, March, is also a hot month in Vientiane, Laos, with average temperature fluctuating between 21.5°C (70.7°F) and 33°C (91.4°F). In Vientiane, the average high-temperature in March is relatively the same as in February - a still tropical 33°C (91.4°F). Weather in March »

Weather in April

April, the same as March, in Vientiane, Laos, is a hot spring month, with temperature in the range of an average high of 34.3°C (93.7°F) and an average low of 23.8°C (74.8°F). April is the warmest month, with an average high-temperature of 34.3°C (93.7°F) and an average low-temperature of 23.8°C (74.8°F). In April, the average heat index is evaluated at a burning hot 47.3°C (117.1°F). Weather in April »

Weather in May

May, the last month of the spring, in Vientiane, is another hot month, with average temperature ranging between min 24.6°C (76.3°F) and max 33°C (91.4°F). In Vientiane, the average high-temperature is relatively the same as in April - a still hot 33°C (91.4°F). Weather in May »

Weather in June

June, the first month of the summer, in Vientiane, is also a hot month, with average temperature varying between 24.9°C (76.8°F) and 31.9°C (89.4°F). In Vientiane, the average high-temperature is relatively the same as in May - a still hot 31.9°C (89.4°F). Weather in June »

Weather in July

July, the same as June, in Vientiane, Laos, is another hot summer month, with average temperature varying between 24.7°C (76.5°F) and 31.3°C (88.3°F). In July, the average high-temperature is essentially the same as in June - a still tropical 31.3°C (88.3°F). Weather in July »

Weather in August

August, the last month of the summer, in Vientiane, is also a hot month, with average temperature fluctuating between 30.8°C (87.4°F) and 24.6°C (76.3°F). In Vientiane, the average high-temperature is almost the same as in July - a still tropical 30.8°C (87.4°F). Weather in August »

Weather in September

The first month of the autumn, September, is still a hot month in Vientiane, Laos, with temperature in the range of an average high of 30.9°C (87.6°F) and an average low of 24.1°C (75.4°F). In September, the average high-temperature is practically the same as in August - a still tropical 30.9°C (87.6°F). Weather in September »

Weather in October

October, like September, is another hot autumn month in Vientiane, Laos, with average temperature varying between 22.9°C (73.2°F) and 30.8°C (87.4°F). In Vientiane, the average high-temperature in October is practically the same as in September - a still tropical 30.8°C (87.4°F). Weather in October »

Weather in November

The last month of the autumn, November, is also a moderately hot month in Vientiane, Laos, with average temperature varying between 19.3°C (66.7°F) and 29.8°C (85.6°F). In November, the average high-temperature is relatively the same as in October - a moderately hot 29.8°C (85.6°F). Weather in November »

Weather in December

December, the first month of the winter, in Vientiane, is also a moderately hot month, with average temperature varying between 28.1°C (82.6°F) and 16.7°C (62.1°F). 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). The average heat index is evaluated at a tropical 30.9°C (87.6°F). Weather in December »
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FAQ

How much does it rain in Vientiane?

In Vientiane, during the entire year, the rain falls for 118 days and collects up to 1660.5mm (65.37") of precipitation.

What is the least humid month in Vientiane?

The least humid month in Vientiane, Laos, is March, with an average relative humidity of 66%.

What is the month with the highest UV index in Vientiane?

Months with the highest UV index in Vientiane are March through September, with an average maximum UV index of 12.

What is the warmest month in Vientiane?

April is the warmest month in Vientiane, Laos, with an average high-temperature of 34.3°C (93.7°F) and an average low-temperature of 23.8°C (74.8°F).

When are the longest days in Vientiane?

June has the longest days of the year, with an average of 13.2h of daylight.

What is the most humid month in Vientiane?

August is the most humid month, with an average relative humidity of 84%.

What is the wettest month in Vientiane?

The month with the most rainfall is August when the rain falls for 21 days and typically aggregates up to 334.6mm (13.17") of precipitation.

What is the month with the least sunshine in Vientiane?

August has the least sunshine of the year in Vientiane, Laos, with an average of 4.4h of sunshine.

What is the coldest month in Vientiane?

The coldest month in Vientiane, Laos, 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 driest month in Vientiane?

The month with the least rainfall is December when the rain falls for 1 days and typically collects 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.

What month has the most sunshine in Vientiane?

The month with the most sunshine is December, with an average of 8.3h of sunshine.

What is the month with the lowest UV index in Vientiane?

The month with the lowest UV index in Vientiane, Laos, is December, with an average maximum UV index of 8.

Average temperature
Vientiane, Laos

Average temperature - Vientiane, Laos

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).

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).

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Average rainfall
Vientiane, Laos

Average rainfall - Vientiane, Laos

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

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Average rainfall days
Vientiane, Laos

Average rainfall days - Vientiane, Laos

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

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Average daylight / Average sunshine
Vientiane, Laos

Average daylight / Average sunshine - Vientiane, Laos

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

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

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Average UV index
Vientiane, Laos

Average UV index - Vientiane, Laos

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).

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