Vientiane weather in August
Temperature, rain and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Poor
Best time to visit: November – January
What is the weather like in Vientiane in August?
In August, Vientiane is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. Expect around 4 hours of sunshine a day. It is the rainy season: rain falls on about 28 days, totalling 390 mm. On about 15 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is not an ideal month for a holiday in Vientiane.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 34 | 36 | 41 |
| Day | 30° | 30° | 30° |
| Night | 25° | 24° | 24° |
| Sun | 4 h | 4 h | 5 h |
| Rain days | 27 | 28 | 24 |
More details for August
- Daylight
- 12 h 45 min05:52 – 18:37
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 10 km/haverage daily peakAll months
- Cloud cover
- 91 %on averageAll months
- Hot days
- 15 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Vientiane
How the score comes together
- Temperatureweight 50 %65 %
- Sunshineweight 20 %17 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Vientiane in August: quick answers
Is Vientiane hot in August?
Yes. In August, Vientiane is hot: daytime highs average 30 °C and nights stay around 24 °C. On about 15 days the thermometer climbs to 30 °C or more.
Does it rain much in Vientiane in August?
It rains often – on about 28 days, adding up to 390 mm.
Vientiane month by month
The whole year in VientianeAll destinations: LaosWhere to go in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences