Vientiane weather in September (Vientiane, Laos)

How is the weather in Vientiane in September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.

In September, Vientiane generally has very high temperatures and heavy rainfall. Daytime temperatures hover around 33°C, while nights can cool down to about 25°C. Bear in mind, these are average temperatures, and it can get even warmer on particular days. Make sure to choose clothing that accommodates the warmth.

Vientiane in September falls under the rainy season with heavy rainfall, averaging around 309 mm for the month. Delving into the climate records from the past 30 years, one can predict that nearly 20 days of the month will see rainfall.

The city usually sees around 168 hours of sunlight, indicating a moderately sunny period.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Vientiane. January, February, November and December generally stand out with the best circumstances. While April, May, June, July, August and September tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Vientiane climate page with graphs.

 

Vientiane, monthly averages in September

Min TemperatureMin Temperature 25°C  
Max TemperatureMax Temperature 33°C  
Chance of RainChance of Rain 66%  
PrecipitationPrecipitation 309 mm  
Rainy daysRainy days 20 days  
HumidityHumidity 83%  
WindspeedWindspeed 4 km/h  
SunshineSunshine 168 hours  
Percentage SunshinePercentage Sunshine  

Where to go in Laos in September

Find out more about the weather in Laos in September and which places have the best weather conditions in this month.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Vientiane in September?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming
7/10
Cycling
7/10
Walking
7/10
Camping
7/10
Outdoor sports
7/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Vientiane.

Our site offers climate and forecast data for every country in the world. Are you going to Laos? On this website you can find historical weather averages for many cities in Laos. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.