Capital city in Vientiane Prefecture, Laos
Vientiane weather by month and the best time to visit
When to go to Vientiane
Nov–Feb is dry and cooler. Mar–May is hot and hazy; Jun–Oct rains bring floods on some streets and heavy humidity.
Vientiane weather by month
Average daily high, rainfall and conditions.
- Jan28°8 mm
- Feb32°13 mm
- Mar35°35 mm
- Apr37°61 mm
- May34°168 mm
- Jun32°170 mm
- Jul31°203 mm
- Aug30°246 mm
- Sep30°204 mm
- Oct30°85 mm
- Nov29°16 mm
- Dec27°6 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 28°C83°F | 15°C59°F | 8 mm | 65% | Pleasant |
| February | 32°C90°F | 18°C64°F | 13 mm | 57% | Pleasant |
| March | 35°C95°F | 22°C71°F | 35 mm | 52% | Hot |
| April | 37°C98°F | 25°C76°F | 61 mm | 55% | Very hot |
| May | 34°C94°F | 25°C77°F | 168 mm | 70% | Rainy |
| June | 32°C90°F | 24°C76°F | 170 mm | 79% | Rainy |
| July | 31°C88°F | 24°C75°F | 203 mm | 82% | Rainy |
| August | 30°C87°F | 24°C75°F | 246 mm | 85% | Rainy |
| September | 30°C87°F | 23°C74°F | 204 mm | 85% | Rainy |
| October | 30°C86°F | 21°C71°F | 85 mm | 82% | Pleasant |
| November | 29°C84°F | 18°C65°F | 16 mm | 76% | Pleasant |
| December | 27°C81°F | 15°C59°F | 6 mm | 71% | Pleasant |
Best months across Laos
| Place | Best months | Warmest month |
|---|---|---|
| Luang Prabang | Nov–Feb | Apr (36°C) |
| Vang Vieng | Nov–Feb | Apr (35°C) |
| Vientiane | Nov–Feb | Apr (37°C) |
| 4000 Islands | Nov–Feb | Apr (37°C) |
| Pakse | Nov–Feb | Mar (36°C) |
| Nong Khiaw | Nov–Feb | Apr (35°C) |
| Thakhek | Nov–Feb | Apr (35°C) |
| Phonsavan | Nov–Mar | Apr (30°C) |
Quick answers
What is the best month to visit Vientiane?
Nov–Feb. Nov–Feb is dry and cooler. Mar–May is hot and hazy; Jun–Oct rains bring floods on some streets and heavy humidity.
When is the rainy season in Vientiane?
Rain peaks in August with about 246 mm. Months with 150 mm or more: May–Sep.
What is the hottest month in Vientiane?
April, with average highs of 37°C (98°F).
How cold does Vientiane get?
The coolest nights are in January, averaging 15°C (59°F).
More about Vientiane
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Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.