Vientiane weather in August
August is one of the least pleasant months in Vientiane: highs of 30°C (86°F) and about 246 mm (9.7 in) of rain on average. Nights average 23°C (74°F) and cloud cover 93% (NASA POWER, 2001–2025 averages). It is the wettest month of the year and the 5th coolest. Compared with July, it is cooler and wetter; September brings highs of 30°C (86°F) and 204 mm (8.0 in) of rain.
Is August a good time to visit Vientiane?
least pleasant month Weather score 40/100.
August is one of the least pleasant months for weather in Vientiane. For better conditions, consider Nov–Feb.
Does it rain a lot in Vientiane in August?
Yes, it is one of the rainy months: about 246 mm (9.7 in) falls in an average August. It is the wettest month of the year.
How warm is Vientiane in August?
Days average 30°C (86°F) and nights 23°C (74°F).
Vientiane weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 28°C (83°F) | 15°C (58°F) | 8 mm | 33% | best |
| February | 32°C (89°F) | 18°C (64°F) | 13 mm | 33% | best |
| March | 35°C (95°F) | 21°C (71°F) | 35 mm | 47% | fair |
| April | 37°C (98°F) | 24°C (76°F) | 61 mm | 58% | fair |
| May | 34°C (93°F) | 25°C (76°F) | 168 mm | 82% | least pleasant |
| June | 32°C (89°F) | 24°C (75°F) | 170 mm | 90% | least pleasant |
| July | 31°C (87°F) | 24°C (74°F) | 203 mm | 92% | least pleasant |
| August | 30°C (86°F) | 23°C (74°F) | 246 mm | 93% | least pleasant |
| September | 30°C (86°F) | 23°C (74°F) | 204 mm | 84% | least pleasant |
| October | 30°C (85°F) | 21°C (70°F) | 85 mm | 59% | fair |
| November | 29°C (83°F) | 18°C (64°F) | 16 mm | 40% | best |
| December | 27°C (80°F) | 15°C (58°F) | 6 mm | 32% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months