Vientiane weather in August
August in Vientiane: sweltering, soaked, with clean air — one of the weakest months to visit.
#12 of 12 months in Vientiane · #577 of 604 destinations to visit in August · comfort 42/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Vientiane climate normals — August
| Daytime high | 30°C / 86°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 76°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 389 mm / 15.3 in | ⛈ soaked |
| Rainy days | 25 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 7.2 h/day | |
| Daylight | 12.7 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Vientiane?
Loading map…
Vientiane in August — FAQ
- Is August a good time to visit Vientiane?
- August in Vientiane: sweltering, soaked, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for Vientiane on SeasonMap's comfort score (42/100).
- What is the weather like in Vientiane in August?
- In August, Vientiane averages a daily high of 30.1°C and a low of 24.6°C, with about 389 mm of rain over roughly 25.4 rainy days.
- What is the air quality in Vientiane in August?
- Vientiane has a mean US Air Quality Index of about 45 in August.