Vientiane weather in May
Temperature, rain and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Poor
Best time to visit: November – January
What is the weather like in Vientiane in May?
In May, Vientiane is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 22 days, totalling 232 mm. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is not an ideal month for a holiday in Vientiane.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 12 h 58 min05:37 – 18:35
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 9 km/haverage daily peakAll months
- Cloud cover
- 77 %on averageAll months
- Hot days
- 24 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Vientiane
How the score comes together
- Temperatureweight 50 %38 %
- Sunshineweight 20 %52 %
- 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 May
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Vientiane in May: quick answers
Is Vientiane hot in May?
Yes. In May, Vientiane is hot: daytime highs average 32 °C and nights stay around 25 °C. On about 24 days the thermometer climbs to 30 °C or more.
Does it rain much in Vientiane in May?
It rains often – on about 22 days, adding up to 232 mm.
Vientiane month by month
The whole year in VientianeAll destinations: LaosWhere to go in May
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