Weather in Vientiane - 14-day forecast

Detailed weather forecast for Vientiane, Laos: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Vientiane

today🌧️ 31°💧 5.6 mm

Sun🌧️ 28°💧 5.1 mm

Mon🌧️ 29°💧 17.5 mm

Tue🌧️ 31°💧 18 mm

Wed🌧️ 29°💧 18.3 mm

Thu🌧️ 31°💧 14.4 mm

Fri🌧️ 31°💧 0.7 mm

Sat🌧️ 29°💧 0.8 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Sunday 6 Sept in Vientiane, the forecast high is 28°C. Typical daytime temperatures at this time of year range from 29°C to 31°C, so it will be exceptionally cool. It is cooler than 95% of similar days.

Saturday 5 Sept

31°Cnear normal

usually 29°C–31°C

night: exceptionally warm rain: typical rainfall wind: typical

Sunday 6 Sept

28°Cexceptionally cool

usually 29°C–31°C

cooler than 95% of similar days

night: exceptionally warm rain: typical rainfall wind: typical

Monday 7 Sept

29°Ccooler than usual

usually 29°C–31°C

cooler than 85% of similar days

night: exceptionally warm rain: more rain than usual wind: lighter than usual

Tuesday 8 Sept

31°Cnear normal

usually 29°C–31°C

night: exceptionally warm rain: more rain than usual wind: lighter than usual

Wednesday 9 Sept

29°Ccooler than usual

usually 29°C–32°C

cooler than 75% of similar days

night: exceptionally warm rain: more rain than usual wind: typical

Thursday 10 Sept

31°Cwarmer than usual

usually 29°C–32°C

warmer than 74% of similar days

night: exceptionally warm rain: more rain than usual wind: stronger than usual

Friday 11 Sept

31°Cnear normal

usually 29°C–32°C

night: exceptionally cool rain: less rain than usual wind: exceptionally strong

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 30°C by day. The coolest year was 1986 (28°C) and the warmest was 2009 (32°C). The current forecast averages 30°C - close to the historical median.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Vientiane

Vientiane - 14-day weather forecast infographic

Vientiane 30 & 45-day weather - long-range outlook

Next 16 days · forecast

29°

around 25° at night · days with rain: 11

Weeks 3-4 · avg for September

31°

around 25° at night · rain chance 49%

Weeks 5-7 · avg for October

32°

around 24° at night · rain chance 15%

The 30 & 45-day outlook for Vientiane: the next 16 days are a numerical forecast updated daily - on average 29° by day and 25° at night. Further out we rely on multi-year climate averages: around 31° in September, and about 32° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Vientiane

Saturday5 September 2026

🌧️31°moderate rain

sunrise 05:56 · sunset 18:21 · night 28° · evening 30° · rain 5.63 mm · humidity 73% · wind 3 m/s · clouds 74%

Sunday6 September 2026

🌧️28°light rain

sunrise 05:56 · sunset 18:20 · night 28° · evening 28° · rain 5.09 mm · humidity 89% · wind 3 m/s · clouds 100%

Monday7 September 2026

🌧️29°moderate rain

sunrise 05:56 · sunset 18:19 · night 24° · evening 28° · rain 17.48 mm · humidity 79% · wind 2 m/s · clouds 87%

Tuesday8 September 2026

🌧️31°moderate rain

sunrise 05:56 · sunset 18:18 · night 26° · evening 27° · rain 17.95 mm · humidity 68% · wind 2 m/s · clouds 95%

Wednesday9 September 2026

🌧️29°moderate rain

sunrise 05:56 · sunset 18:17 · night 25° · evening 26° · rain 18.29 mm · humidity 74% · wind 3 m/s · clouds 100%

Thursday10 September 2026

🌧️31°moderate rain

sunrise 05:57 · sunset 18:17 · night 25° · evening 26° · rain 14.35 mm · humidity 64% · wind 4 m/s · clouds 88%

Friday11 September 2026

🌧️31°light rain

sunrise 05:57 · sunset 18:16 · night 23° · evening 25° · rain 0.66 mm · humidity 59% · wind 6 m/s · clouds 100%

Saturday12 September 2026

🌧️29°light rain

sunrise 05:57 · sunset 18:15 · night 23° · evening 25° · rain 0.75 mm · humidity 63% · wind 2 m/s · clouds 43%

Sunday13 September 2026

🌤️30°scattered clouds

sunrise 05:57 · sunset 18:14 · night 24° · evening 25° · rain 0.18 mm · humidity 56% · wind 2 m/s · clouds 29%

Monday14 September 2026

☀️30°clear sky

sunrise 05:57 · sunset 18:13 · night 25° · evening 25° · rain 1.59 mm · humidity 57% · wind 3 m/s · clouds 7%

Tuesday15 September 2026

☁️32°broken clouds

sunrise 05:57 · sunset 18:12 · night 25° · evening 27° · rain 11.16 mm · humidity 54% · wind 2 m/s · clouds 59%

Wednesday16 September 2026

🌧️31°light rain

sunrise 05:57 · sunset 18:12 · night 24° · evening 26° · rain 2.49 mm · humidity 63% · wind 3 m/s · clouds 93%

Thursday17 September 2026

🌧️24°light rain

sunrise 05:58 · sunset 18:11 · night 23° · evening 23° · rain 10.83 mm · humidity 94% · wind 3 m/s · clouds 100%

Friday18 September 2026

🌧️26°light rain

sunrise 05:58 · sunset 18:10 · night 24° · evening 24° · rain 0.54 mm · humidity 80% · wind 2 m/s · clouds 100%

Saturday19 September 2026

🌧️26°light rain

sunrise 05:58 · sunset 18:09 · night 24° · evening 25° · rain 0.75 mm · humidity 83% · wind 1 m/s · clouds 99%

Sunday20 September 2026

🌧️31°moderate rain

sunrise 05:58 · sunset 18:08 · night 24° · evening 25° · rain 4.2 mm · humidity 68% · wind 3 m/s · clouds 87%

UV index in Vientiane - is it safe to sunbathe?

Today the UV index in Vientiane is 7 (high) - unprotected fair skin can burn in about 30 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

Vientiane weather through the year

Warmest, driest months on average: January, February, November, December.

Nearby and related places

Vang ViengPakxanPhonsavanLuang PrabangPhitsanulokXam NeuaPakxéMuang Xay

FAQ - Vientiane weather

What is the weather like in Vientiane today?

Today it is about 31° during the day and 28° at night, moderate rain.

How far ahead can I check the forecast for Vientiane?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.