Year-round weather and climate in Vientiane, Laos
Average temperatures in Vientiane run from an average low of 18°C64°F in January up to an average high of 34°C93°F in April. December is the driest month at 0 rainy days; September the wettest at 28. Here is the annual climate data, so you know what you are packing for.
Good to know
- Population
- 841K
- Currency
- LAK
- Language
- Lao
- Time zone
- Vientiane
Best time to visit
The most pleasant weather falls in December, January, and February, offering a perfect balance of comfortable temperatures and clear skies.
Rain character
Tropical Downpours: Expect intense bursts of rain during wetter months. Pack quick-drying footwear and a compact umbrella.
Day-to-night swing
Evening Chill: Temperatures drop by a noticeable 10°C18°F when the sun goes down. A light sweater or jacket is usually all you need for evening plans.
Seasonality Profile
Humid Subtropical: Sweltering, wet summers accompanied by mild, drier winters.
Evening vibe
Seasonal Terraces: During the more temperate months, the city opens up with lively outdoor terraces. For the rest of the year, expect to dine indoors.
Sightseeing stamina
Summer Heat Fatigue: Midday heat in March, April, and May is intense. Pack high-SPF sunscreen and a wide-brimmed hat.
Average temperatures, sunshine, and rainfall
Average monthly weather in Vientiane, based on recent historical data. Essential insights on temperature swings, expected rainfall, and daily sunshine.
Bars span the average daily low to high. Dec is typically driest at 0 days (1mm); Sep the wettest at 28 days (442mm).
| Month | Average high | Average low | Sunshine hours | Rainy days | Total rainfall |
|---|---|---|---|---|---|
| Jan | 28°C / 82°F | 18°C / 64°F | 10h | 2 | 10mm |
| Feb | 30°C / 85°F | 19°C / 67°F | 10h | 2 | 19mm |
| Mar | 32°C / 90°F | 23°C / 73°F | 10h | 9 | 63mm |
| Apr | 34°C / 93°F | 25°C / 76°F | 11h | 8 | 74mm |
| May | 33°C / 92°F | 25°C / 78°F | 10h | 21 | 219mm |
| Jun | 31°C / 88°F | 25°C / 77°F | 8h | 25 | 324mm |
| Jul | 31°C / 88°F | 25°C / 77°F | 9h | 27 | 361mm |
| Aug | 30°C / 87°F | 25°C / 76°F | 7h | 27 | 423mm |
| Sep | 30°C / 86°F | 24°C / 76°F | 8h | 28 | 442mm |
| Oct | 30°C / 86°F | 23°C / 73°F | 10h | 15 | 163mm |
| Nov | 30°C / 86°F | 21°C / 70°F | 10h | 3 | 23mm |
| Dec | 28°C / 82°F | 18°C / 64°F | 10h | 0 | 1mm |
Weather data by Open-Meteo.com (opens in a new tab)
Frequently Asked Questions
When is the sunniest time of year to visit Vientiane?
The most sunshine in Vientiane comes around April, averaging 11 hours a month. If you're heading there then, pack your sunglasses and sunscreen.
What clothes should I pack for Vientiane?
Your packing list depends entirely on when you travel. Temperatures in Vientiane swing from an average low of 18°C64°F in January up to 34°C93°F in April. The Packola app builds a tailored packing list for you based on the live weather forecast for your exact travel dates.
Do I need to pack an umbrella for Vientiane?
Vientiane gets rain on about 167 days out of the year. The wettest month is September. If you're traveling during the rainy season, you'll definitely want to pack an umbrella and a light rain jacket.
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in Vientiane with Packola.
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