Vientiane Weather in May – Average Temperature and Rainfall
- High
- 32.8°
- Low
- 25.1°
- Rainfall
- 221 mm
- Rainy season
- 22d
- max
- 42.7°
- min
- 20.0°
May
- Early
- 34.2° 37.7 mm
- Mid
- 32.8° 66.0 mm
- Late
- 31.5° 117.5 mm
Summary
The climate figures for Vientiane are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 2,018 mm.
The rainy season runs May–October. The wettest month is August with 434.9 mm across 27 rain days; the driest is December at just 5.3 mm.
The hottest month is April (average high 34.2°C) and the coolest is December (27.5°C).
The most comfortable time to visit Vientiane is December — less rain and milder heat.
Monthly averages
Common questions
Will it rain in Vientiane today?
Yes. Rain is expected around 14:00–21:00, totalling roughly 1 mm.
How hot is it in Vientiane today?
Between 26°C and 31°C, with a felt maximum of 37°C.
What is the weather in Vientiane tomorrow?
Tomorrow: thunderstorm, 24–30°C, with a 78% chance of rain.