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

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
January, the same as December, is another warm winter month in Vientiane, Laos, 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 essentially the same as in December - a still moderately hot 28.4°C (83.1°F). Weather in January »

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

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

April, like March, is a hot spring month in Vientiane, Laos, with average temperature fluctuating between 34.3°C (93.7°F) and 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). The average heat index in April is calculated to a blazing hot 47.3°C (117.1°F). Weather in April »

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

The first month of the summer, June, is still a tropical month in Vientiane, Laos, with temperature in the range of an average high of 31.9°C (89.4°F) and an average low of 24.9°C (76.8°F). In Vientiane, Laos, the average high-temperature is relatively the same as in May - a still tropical 31.9°C (89.4°F). Weather in June »

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

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

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

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

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

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). December is the coldest month, 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 in December is estimated at a tropical 30.9°C (87.6°F). Weather in December »

How much does it rain in Vientiane?

Throughout the year, in Vientiane, there are 118 rainfall days, and 1660.5mm (65.4") of precipitation is accumulated.

What is the least humid month in Vientiane?

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

When is the highest UV index in Vientiane?

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

What is the warmest month in Vientiane?

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).

When are the longest days in Vientiane?

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

What is the most humid month in Vientiane?

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

What is the rainiest month in Vientiane?

August is the month with the most rainfall. Rain falls for 21 days and accumulates 334.6mm (13.2") 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?

December is the coldest month in Vientiane, Laos, 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?

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

What month has the most sunshine in Vientiane?

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

When is the lowest UV index in Vientiane?

December is the month with the lowest UV index in Vientiane, with an average maximum UV index of 8.
Average temperature - Vientiane, Laos
Average rainfall - Vientiane, Laos

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 - Vientiane, Laos
Average daylight / Average sunshine - 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).