Vientiane Weather in May
In Vientiane, May brings very high daytime temperatures around 35°C (95°F), with nights cooling to 25°C (77°F). This month falls within the rainy season, so expect frequent rainfall.
Rainfall in Vientiane in May
Vientiane is in the rainy season in May, with rain on around 18 days and an average of 266 mm (10 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Vientiane in May
Daytime temperatures in Vientiane reach 35°C (95°F) in May, dropping to 25°C (77°F) at night. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With overnight lows of 25°C (77°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in Vientiane in May
Enjoy a sunny month with about 198 hours of sunshine, even though this month falls in the wet season. There is still enough sun to enjoy the outdoors.
Wind Speed in Vientiane in May
Average wind conditions reach 1 m/s (2 knots) in May. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, November and December typically offer the best weather for Vientiane.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Laos, check out our Vientiane's climate page.
Vientiane Temperature in May
Min Temperature
25°C (77°F)
Max Temperature
35°C (95°F)
Chance of Rain
60%
Precipitation
266 mm (10 in)
Rainy days
18 days
Humidity
78%
Windspeed
1 m/s (2 knots)
Sunshine
198 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Vientiane typically stay consistent throughout May, with daily highs averaging around 35°C (95°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Vientiane in May
Browse day-by-day weather records for Vientiane spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Vientiane historical weather extremes in May
Based on 49 years of weather observations in Vientiane between 1976 and 2025, these are the recorded extremes.
- On May 2, 1990, temperatures climbed to 44°C (111°F), marking the warmest May day on record.
- Vientiane experienced its chilliest May day on May 6, 1976, reaching only 22°C (72°F).
- The lowest overnight temperature recorded in May was 19°C (66°F) (May 6, 1976).
Best Places in Laos in May
Find out more about the weather in Laos and which places have the best travel conditions in this month. See all of Laos in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Vientiane in May
Get ready for hot weather in May! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. Also bring a poncho, it will rain a lot! Waterproof everything you can. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Vientiane in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Laos, check out our Vientiane's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Vientiane climate overview or explore weather in Laos.
