Weather in Vientiane — today
Now in Vientiane
🌤️
+30°
Mostly clear
Feels like +38° · humidity 66%
Today 12.9: +31° / +24°
🕐 12:25
Wind
5 km/h
UV index
8
Air (AQI)
74 · Poor
Precipitation
76%
Humidity
66%
Pressure
1013 hPa
Sunrise / sunset
05:57 / 18:14
👕 What to wear today
Warm — a T-shirt and light trousers or shorts.
☂️ Take an umbrella🧴 SPF 50Feels warmer by 8°
Weather for an activity:
Detailed weather information for Vientiane
Today, 12 September, Saturday, in Vientiane (Laos): cloudy, light rain in places, hot. During the day the air will warm up to +31°, at night around +24°. Due to high humidity it feels like +38°. UV is extreme (index 8) — better stay in the shade at midday. Wind up to 15 km/h. High chance of rain — be sure to take an umbrella or a raincoat. Light summer clothing will do — a T-shirt and shorts or light trousers. The sun will rise at 05:57 and set at 18:14 — daylight lasts 12 hours.Hourly weather in Vientiane
💧 The bars at the bottom show the hourly precipitation probability. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).
Weather in Vientiane for 14 days
Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).
▶
Today 12.9
🌦️
💧 76%
+24° +31°
Morning
🌦️
+27°
Day
🌦️
+31°
Evening
🌇
+29°
Night
🌙
+24°
▶
Tomorrow 13.9
🌦️
💧 45%
+25° +31°
Morning
☁️
+26°
Day
🌦️
+31°
Evening
🌇
+29°
Night
🌙
+25°
▶
Mon 14.9
🌦️
💧 84%
+25° +29°
Morning
🌦️
+26°
Day
🌦️
+29°
Evening
🌇
+28°
Night
🌙
+25°
▶
Tue 15.9
⛈️
💧 87%
+24° +28°
Morning
⛈️
+25°
Day
⛈️
+28°
Evening
🌇
+27°
Night
🌙
+24°
▶
Wed 16.9
🌦️
💧 87%
+23° +28°
Morning
🌦️
+25°
Day
🌦️
+28°
Evening
🌇
+27°
Night
🌙
+23°
▶
Thu 17.9
⛈️
💧 84%
+24° +28°
Morning
⛈️
+25°
Day
⛈️
+28°
Evening
🌇
+27°
Night
🌙
+24°
▶
Fri 18.9
⛈️
💧 92%
+24° +28°
Morning
⛈️
+25°
Day
⛈️
+28°
Evening
🌇
+27°
Night
🌙
+24°
▶
Sat 19.9
⛈️
💧 90%
+23° +31°
Morning
⛈️
+26°
Day
⛈️
+31°
Evening
🌇
+29°
Night
🌙
+23°
▶
Sun 20.9
⛈️
💧 80%
+23° +31°
Morning
⛈️
+26°
Day
⛈️
+31°
Evening
🌇
+29°
Night
🌙
+23°
▶
Mon 21.9
🌦️
💧 71%
+23° +31°
Morning
🌦️
+26°
Day
🌦️
+31°
Evening
🌇
+29°
Night
🌙
+23°
▶
Tue 22.9
🌦️
💧 57%
+23° +30°
Morning
🌦️
+26°
Day
🌦️
+30°
Evening
🌇
+28°
Night
🌙
+23°
▶
Wed 23.9
⛈️
💧 55%
+24° +30°
Morning
⛈️
+26°
Day
⛈️
+30°
Evening
🌇
+29°
Night
🌙
+24°
▶
Thu 24.9
⛈️
💧 51%
+24° +30°
Morning
⛈️
+26°
Day
⛈️
+30°
Evening
🌇
+29°
Night
🌙
+24°
▶
Fri 25.9
🌦️
💧 53%
+24° +29°
Morning
🌦️
+26°
Day
🌦️
+29°
Evening
🌇
+28°
Night
🌙
+24°
🗺️ Precipitation radar
Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.
Rain intensity:lightmoderateheavy
🎯 What to do in this weather — indices of the day
Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.
🏃 Running
0 / 100
comfort for running · Bad
🧴 UV
72%
extreme · high
☂️ Rain
76%
likely · high
✨ Stars
35 / 100
evening visibility · So-so
🧺 Laundry drying
0 / 100
will dry outside · Bad
🚗 Car wash
4 / 100
better to wait · Bad
🌫️ Air quality
74
Poor air
European AQI
PM2.5: 16PM10: 17O₃: 148NO₂: 1
People with allergies or asthma should reduce time outdoors.
🌅 Sun, moon and sea
Sunrise
05:57
Sunset
18:14
Golden hour
17:45
Daylight
12 h (-1 min vs yesterday)
Vientiane climate by month
Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.
+27°
+17°
Jan
+30°
+19°
Feb
+32°
+22°
Mar
+34°
+24°
Apr
+32°
+25°
May
+30°
+25°
Jun
+30°
+24°
Jul
+30°
+24°
Aug
+30°
+24°
Sep
+29°
+23°
Oct
+29°
+20°
Nov
+27°
+17°
Dec
swipe sideways →
Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit
| Month | Day | Night | Precipitation | What to pack and what makes the month notable (events, nuances) |
|---|---|---|---|---|
| January | +27° | +17° | 11 mm | Gentle warmth — about +27° daytime, great walking weather. 😊 light summer clothing. Weather-wise, one of the three best months to visit. |
| February | +30° | +19° | 14 mm | A comfortable month: +30° by day without exhausting heat. 😊 light summer clothing. |
| March | +32° | +22° | 38 mm | Hot (+32° by day) but dry — manageable with a sensible schedule. ☀️ water and sunscreen. |
| April | +34° | +24° | 76 mm | Up to +34° by day — hot, yet not muggy; mornings and evenings are pleasant. Frequent rain (76 mm over the month) — keep indoor backup plans. ☀️ water and sunscreen. This is the hottest month of the year in Vientiane. |
| May | +32° | +25° | 254 mm | A comfortable month: +32° by day without exhausting heat. One of the wettest months (254 mm): downpours can derail plans. 😊 light summer clothing. |
| June | +30° | +25° | 312 mm | Warm and comfortable: +30° by day, +25° at night. It's a rainy month (312 mm) — an umbrella is a must. 😊 light summer clothing. The longest daylight hours of the year — more time for everything. |
| July | +30° | +24° | 372 mm | Gentle warmth — about +30° daytime, great walking weather. Frequent rain (372 mm over the month) — keep indoor backup plans. 😊 light summer clothing. |
| August | +30° | +24° | 409 mm | A comfortable month: +30° by day without exhausting heat. One of the wettest months (409 mm): downpours can derail plans. 😊 light summer clothing. Statistically the wettest month of the year. |
| September | +30° | +24° | 310 mm | Warm and comfortable: +30° by day, +24° at night. It's a rainy month (310 mm) — an umbrella is a must. 😊 light summer clothing. |
| October | +29° | +23° | 102 mm | Gentle warmth — about +29° daytime, great walking weather. Frequent rain (102 mm over the month) — keep indoor backup plans. 😊 light summer clothing. |
| November | +29° | +20° | 22 mm | A comfortable month: +29° by day without exhausting heat. 😊 light summer clothing. Weather-wise, one of the three best months to visit. |
| December | +27° | +17° | 8 mm | Warm and comfortable: +27° by day, +17° at night. 😊 light summer clothing. This is the coldest month of the year. |
When to visit Vientiane
✅ Recommended time to visit
🌟 Best time: January, November, December
Daytime air+27…+29°
Precipitationrare
Why: comfortable +27…+29° by day, little rain.
⚠️ Doable, with caveats
🌤️ Shoulder season: February, March, April, May, June, October
Daytime air+29…+34°
Precipitationoften
Why: noticeable rain risk (14–312 mm/month) — pack an umbrella and backup plans.
🔴 Not the best time
🌤️ Shoulder season: July, August, September
Daytime air+30…+30°
Precipitationoften
Why: the rainy season (310–409 mm/month) — downpours almost daily.
Bottom line: the best time to visit Vientiane is November – January, and the most comfortable months are January, November, December. The toughest months to visit are July, August, September: frequent rain.
🌡️ Today vs the climate normal
Today's high
+31°
Normal for September
+30°
Deviation
1° warmer than normal
A year ago on this day
+31°
Record for this date
+34° (2021)
The normal, “a year ago” and the record come from the weather archive since 1940 (Open-Meteo / ERA5).
Weather archive for Vientiane
📅 See what the weather was like on any day since 1940. For example: “what was the weather on March 2, 2021”.
Show the archive for the selected day →
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Weather in cities near Vientiane
Frequently asked questions about the weather in Vientiane
What is the weather in Vientiane right now?＋
Mostly clear, +30°, feels like +38°.
Will it rain in Vientiane today?＋
Yes: 76% chance, 4 mm.
When is the best time to visit Vientiane?＋
Best time to visit — November – January.
What time are sunrise and sunset in Vientiane?＋
Sunrise 05:57, sunset 18:14.
Does it snow in Vientiane in winter?＋
No, it practically never snows.
What is the climate in Vientiane by month?＋
Summers up to +34° in April, winters around +17° in December; the wettest month is August.
How hot is it in Vientiane in summer?＋
☀️ Very hot. Drink more water, avoid the midday sun, sunscreen is needed.