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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.
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.
Pick a month to see the average temperature, rainfall and sunshine in Vientiane - and find the best time to visit.
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).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
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.
Based on 50 years of weather observations in Vientiane between 1976 and 2026, these are the recorded extremes.
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 is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Vientiane climate overview or explore weather in Laos.
Where to go in May - average daytime high across popular destinations.
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