Vientiane Weather & Climate: Best Time to Visit
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 January 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.
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, January.
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)
Vientiane 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Vientiane
With its warm weather, Vientiane experiences temperatures from 30°C (86°F) to 37°C (99°F) throughout the year. January, February, March, April, November and December offers the driest weather, which makes it a good time to visit.It's smart to plan your activities during the cooler morning hours or take advantage of the refreshing evenings.
Note that May, June, July, August and September make up the rainy season, with heavier precipitation expected. Ready to plan your travels but need destination ideas? Our smart tool recommends places based on the climate conditions you prefer. Start planning with our destination weather tool.
