Vientiane in May
4.8out of 10
Not the best time
Hot: daytime highs around 33°C. Very wet: about 23 rainy days.
33°CAvg high
25°CAvg low
23Rainy days (265 mm)
12:51 hDaylight
05:41Sunrise · 18:31 Sunset
Why this score
- Hot: daytime highs around 33°C
- Very wet: about 23 rainy days
What to wear and pack
- Light, breathable clothing
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in May varies a lot between years (±3.6 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 29°C | 17°C | 11 mm | 2 | – | – | 8.8 |
| February | 32°C | 18°C | 15 mm | 2 | – | – | 8.0 |
| March | 34°C | 21°C | 36 mm | 6 | – | – | 6.8 |
| April | 35°C | 24°C | 75 mm | 12 | – | – | 5.8 |
| May | 33°C | 25°C | 265 mm | 23 | – | – | 4.8 |
| June | 33°C | 26°C | 316 mm | 25 | – | – | 5.1 |
| July | 32°C | 25°C | 374 mm | 27 | – | – | 5.3 |
| August | 31°C | 25°C | 402 mm | 27 | – | – | 5.4 |
| September | 32°C | 25°C | 296 mm | 24 | – | – | 5.4 |
| October | 31°C | 23°C | 99 mm | 12 | – | – | 6.7 |
| November | 31°C | 20°C | 21 mm | 3 | – | – | 8.2 |
| December | 29°C | 17°C | 9 mm | 1 | – | – | 8.9 |
Frequently asked questions
How hot is Vientiane in May?
Daytime highs average 33°C and nights about 25°C.
When is the best time to visit Vientiane?
The best months are December, January.