Vientiane Climate by Month
Vientiane, Vientiane Prefecture, Laos
Hot all year, with a rainy season from June to September.
Vientiane is hot all year, with a rainy season from June to September. Expect highs of 96°F (36°C) in April and 85°F (30°C) in December, with the coldest nights (January) near 61°F (16°C). It gets 63 in (1607 mm) of rain a year, 73% of it from June to September. December and January are almost completely dry.
- Warmest month
- 96°F(36°C)
- Average high, April
- Coldest nights
- 61°F(16°C)
- Average low, January
- Rain per year
- 63 in(1607 mm)
- Wettest: August
- Humidity
- 70%
- Sunniest: April
Best and worst months in Vientiane
Best for weatherDecember and January are the best time for weather in Vientiane: highs near 85°F (30°C) and almost no rain.
Least pleasantJuly and August are the least pleasant; August is the wettest, with 13 in (335 mm) of rain.
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in December.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Vientiane weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuaryBest | 85°F(30°C) | 61°F(16°C) | 0.2 in(6 mm) | 64% | 4.5 |
| FebFebruary | 89°F(32°C) | 63°F(17°C) | 0.6 in(15 mm) | 65% | 4.9 |
| MarMarch | 93°F(34°C) | 69°F(21°C) | 1.3 in(33 mm) | 64% | 5.1 |
| AprApril | 96°F(36°C) | 74°F(23°C) | 2.6 in(66 mm) | 63% | 5.6 |
| MayMay | 94°F(34°C) | 76°F(24°C) | 8.7 in(222 mm) | 71% | 5.3 |
| JunJune | 92°F(34°C) | 78°F(25°C) | 9.9 in(252 mm) | 75% | 4.9 |
| JulJuly | 91°F(33°C) | 77°F(25°C) | 13 in(323 mm) | 78% | 4.3 |
| AugAugust | 90°F(32°C) | 77°F(25°C) | 13 in(335 mm) | 80% | 4.4 |
| SepSeptember | 90°F(32°C) | 75°F(24°C) | 10 in(258 mm) | 78% | 4.5 |
| OctOctober | 90°F(32°C) | 73°F(23°C) | 3.0 in(75 mm) | 74% | 5.0 |
| NovNovember | 89°F(31°C) | 67°F(19°C) | 0.6 in(16 mm) | 68% | 4.5 |
| DecDecemberBest | 85°F(30°C) | 61°F(16°C) | 0.2 in(6 mm) | 64% | 4.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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