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Vientiane Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Vientiane.
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10-day forecastForecast
Climate overview of Vientiane
Vientiane, Vientiane, Laos, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 33°C (91°F), peaking in April at 37°C (99°F) and dipping in December to 30°C (86°F).
The city receives considerable rainfall, with around 1948 mm (77 in) annually. August is the wettest month. It has distinct dry (November to March) and wet (May to September) seasons. The sunniest month is December, with 8.3 hours of sunshine per day on average.
Vientiane Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Vientiane - and find the best time to visit.
Monthly Temperature in Vientiane
With minimal seasonal shifts, Vientiane experiences a constant climate year-round. Typically, average maximum daytime temperatures range from a very hot 37°C (99°F) in April to a very warm 30°C (86°F) in the coolest month, December.
Nights vary from 26°C (79°F) in April to around 17°C (63°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Vientiane
Vientiane has a notably wet climate with abundant precipitation, recording 1948 mm (77 in) of rainfall per year. The climate in Vientiane shows significant variation throughout the year. Expect heavy rainfall in August, the wettest month, with an average of 399 mm (16 in) of precipitation over 24 rainy days.
In contrast, the driest month December offers drier and sunnier days, with around 10 mm (0.4 in) of rainfall over 2 rainy days. For more details, please visit our Vientiane Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Vientiane
For those who appreciate different seasons, Vientiane serves as an ideal destination. Expect longer, more sun-filled days in December with an average of 8.3 hours of sunshine daily, and embrace the darker days in July, offering only 4.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Vientiane by Month
The relative humidity is high throughout the year in Vientiane.
The city experiences its highest humidity in August, reaching 84%. In March, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Vientiane
The average wind speed over the year ranges from 1 m/s (2 knots) to 1 m/s (2 knots). It is lower in January, February, March, April, May, June, July, August, September, October, November and December and higher in January, February, March, April, May, June, July, August, September, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Vientiane
For comfortable weather, consider visiting Vientiane in January, November and December. Conditions are usually least favourable in March, April, May, June, July, August, September and October.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very good
Feb
good
Mar
very hot
Apr
very hot
May
very wet
Jun
very wet
Jul
very wet
Aug
very wet
Sep
very wet
Oct
wet
Nov
very good
Dec
very good
- Best overall: January, November and December
- Warmest weather: March and April
- Most sunshine: January and December
- Fewest rainy days: January, February, November and December
- Wettest months: May, June, July, August and September, when rainfall is highest.
- Seasonal pattern: Distinct dry (November to March) and wet (May to September) seasons
Frequently asked questions about the climate in Vientiane
What is the best time to visit Vientiane?
January, November and December typically offer the most optimal weather in Vientiane. In contrast, March, April, May, June, July, August, September and October tend to have less optimal conditions. Vientiane has distinct dry (November to March) and wet (May to September) seasons.
What temperatures can I expect in Vientiane?
Daytime highs range from 30°C (86°F) in December to 37°C (99°F) in April. Nighttime lows range from 17°C (63°F) to 26°C (79°F). Temperatures stay relatively stable year-round.
How much rain does Vientiane get?
Annual rainfall is around 1948 mm (77 in). August is the wettest month with 399 mm (16 in), while December is the driest with 10 mm (0.4 in).
How sunny is Vientiane?
Vientiane receives around 2,362 hours of sunshine per year. December is the sunniest month with 249 hours, while July is the cloudiest with just 130 hours. Overall, Vientiane enjoys abundant sunshine.
Vientiane 3-Day Forecast
Vientiane on the map
Vientiane is highlighted - select any city to see its climate.
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