May · Laos
Best time to visit Vientiane in May Weather, crowds & prices
Weather in Vientiane in May
Average temperature 29°C, 282 mm of rain, about 25 days with 6+ hours of sunshine and 75% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
3.0/10
Ranked #12 of 12 months
- Avg temp
- 29°C
- Rainfall
- 282 mm
- Humidity
- 75%
- Days with 6h+ sun
- 25
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
May in Vientiane scores 3.0/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 29°C, 282 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Vientiane's golden stupa, riverfront and quiet lanes make it Southeast Asia's calmest capital.
May in Vientiane — off-season conditions
Days in May average 29°C (83°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 282 mm, but with about 25 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 3/10 on the same scale — 12th of 12 months, versus 9.6/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, January is materially better in Vientiane — 6.6 points higher on the same scale.
Frequently asked
- What is the weather like in Vientiane in May?
- In May, Vientiane averages 29°C, 282 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 3.0/10.
- Is May a good time to visit Vientiane?
- May earns a 3.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Vientiane in May?
- Expect about 282 mm of rain in May. Average humidity is 75% and there are about 25 days with 6+ hours of sunshine.
Curated in Vientiane
Tickets & experiences
Things to do in Vientiane
Vientiane, Laos. Live activities and tours from GetYourGuide, matched to this destination.