Weather in Vientiane in August 2025
- August is usually the wettest month of the year in Vientiane;
Average weather
Average temperature in Vientiane in August
The temperature in August is +90°F on average, with a range between a maximum of +97°F during the day and a minimum of +75°F at night.
The average maximum temperature goes up 17% by the end of the month, compared with the beginning of the month, from +88°F to +91°F.
Is Vientiane warm or cold in August?
Vientiane is typically hot in August.
Maximum temperatures go down compared to the previous month from +90°F to +88°F. The minimum temperature also goes up from +77°F to +77°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
Take a look at how August is compared to other months in Vientiane:
Climate in Vientiane in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +90°F | +88°F | +88°F | ||||
| Min. temperature | ||||||
| +72°F | +73°F | +70°F | ||||
| Max. temperature | ||||||
| +104°F | +99°F | +97°F | ||||
| Rainfall | ||||||
| 347 mm | 373 mm | 282 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 0 m/s | ||||
| Humidity | ||||||
| 83% | 84% | 83% | ||||
| Air pressure | ||||||
| 1004 HPa | 1005 HPa | 1007 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 0 | ||||
| Cloudy days | ||||||
| 1 | 1 | 2 | ||||
| Rainy days | ||||||
| 27 | 27 | 24 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting colder in August. From +90°F in the day, the average maximum temperature lowers to +88°F. Prepare for more rain. Average rainfall goes from 347 mm to 373 mm. Humidity rises from 83% to 84%. The average wind speed doesn’t change much during August, staying around 1 m/s. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 1 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Vientiane is gradually increasing during August, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last August in Vientiane?
Climate Change Over the Years
The climate in Vientiane in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1996 (+87°F) and the highest in 2019 (+92°F). The driest year was 2019 with only 1054 mm of rainfall, and the wettest year was 1994 with 2326 mm.
FAQ
Is August a good time to visit Vientiane?
Can you sunbathe in Vientiane in August?
Is Vientiane rainy in August?
Is it sunny in Vientiane in August?
Other cities in Laos
Monthly weather in Vientiane
Source of the data
For this page, we’ve looked at the typical weather in Vientiane, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
