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Climate · Vientiane

Vientiane in May

Hot and wet, as the days lengthen.

Typical weather, averaged over 30 years

May in Vientiane is hot: highs near 93°F, lows near 77°F. Rain falls on about five days a week, more often as the month goes on, and the days lengthen by 19 minutes from the first week to the last.May in Vientiane is hot: highs near 34°C, lows near 25°C. Rain falls on about five days a week, more often as the month goes on, and the days lengthen by 19 minutes from the first week to the last.

High
93°F34°Caverage
Low
77°F25°Caverage
Wet days
5a week · 72% of days
Daylight
12h 58mon average

Is May a good time to visit Vientiane?

May sits outside Vientiane's best months, which run from December to January. Expect hot days and rain on about five days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How May sits in the year

week by week

Temperature

Highs near 93°F in May, against 84°F to 96°F through the year.Highs near 34°C in May, against 29°C to 36°C through the year.

Chance of a wet day

72% of days in May, against 4% to 89% through the year.

Cloud cover

77% cover in May, against 41% to 84% through the year.

Daylight

12h 58m in May, against 11h 04m to 13h 11m through the year.

Week by week, lightly smoothed, with May shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. April96°36°low 76°low 24°2 wet days a weekRain on about two days a week.
  2. May93°34°low 77°low 25°5 wet days a weekRain on about five days a week.
  3. June91°33°low 77°low 25°6 wet days a weekRain on about six days a week.

Where Vientiane sits, in May

Asia/Vientiane
this place
typical high in May 40°F4°C95°F35°C
Sunrise, mid-May
5:37 AMsets 6:35 PM
Above the sea
160 mlow-lying
Latitude
18.0°Nnorthern hemisphere
Nearest of ours
Luang Prabang220 km north

The land around Vientiane, shaded by its typical high in May, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Laos in May

high · low · wet days
See May on the planning mapThe whole year in Vientiane

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Vientiane. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.