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30-year normals (1991-2020)
Vientiane has a tropical savanna climate, classified as Aw in the Köppen system. The warmest month is April with an average high of 34°C, while the coldest month is January with lows dropping to 17°C. The annual temperature range of 17°C reflects moderate seasonal variation.
The driest month is December with only 1 rain days and 8mm of precipitation. For travellers, December through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 78% to 78% throughout the year.
Based on temperature and rainfall data, the best months to visit Vientiane are January, December, February. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
Full Best Time to Visit GuideWarmest Month
34°C
April
Coldest Month
17°C
January
Driest Month
1 days
December
Annual Range
17°C
17° to 34°
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 27°C | 17°C | 2 | 10h | View |
| February | 30°C | 19°C | 2 | 11h | View |
| March | 32°C | 22°C | 6 | 11h | View |
| April | 34°C | 24°C | 11 | 11h | View |
| May | 32°C | 25°C | 23 | 9h | View |
| June | 30°C | 25°C | 26 | 8h | View |
| July | 30°C | 24°C | 28 | 7h | View |
| August | 30°C | 24°C | 28 | 7h | View |
| September | 30°C | 24°C | 24 | 8h | View |
| October | 29°C | 23°C | 11 | 10h | View |
| November | 29°C | 20°C | 3 | 10h | View |
| December | 27°C | 17°C | 1 | 10h | View |
January
2 rain days, 10h sun
February
2 rain days, 11h sun
March
6 rain days, 11h sun
April
11 rain days, 11h sun
May
23 rain days, 9h sun
June
26 rain days, 8h sun
July
28 rain days, 7h sun
August
28 rain days, 7h sun
September
24 rain days, 8h sun
October
11 rain days, 10h sun
November
3 rain days, 10h sun
December
1 rain days, 10h sun
Vientiane in April
Data Sources for Vientiane
Climate normals represent 30-year averages (1991-2020). Individual years may vary.