Weather Vientiane Today – Temperature, Rain & Hourly Forecast
Monday, 21/09/2026
31°
Overcast · Feels like 37°
Last data 20/09 12:02 · data may be out of date
- High/Low
- 31°/23°
- Humidity
- 69%
- Wind
- 11 km/h
- Rainfall
- 7.8 mm
- UV index
- 7.5
- Pressure
- 1015 hPa
- Sunrise
- 05:58
- Sunset
- 18:07
Today
00
06
12
18
00:0006:0012:0018:00
Summary
Vientiane is warm today, 23–31°C, under thunderstorm.
Rain concentrates around 00:00–06:00 with about 7.8 mm — worth taking an umbrella.
Thunderstorms are possible around 00:00–06:00.
Maximum UV of 7.5 at 14:00 — wear a hat for longer stints outdoors.
Humidity of 69% pushes the felt temperature to 37°C.
Wind runs 9 km/h out of the north-east.
Temperatures hold steady near 31°C through the week.
The wettest day ahead is Thursday 24/09 with about 12 mm.
Sunrise 05:58, sunset 18:07.
Best time to visit
Outdoor heat stress
31°C
Peaks at 19:00 — take breaks
Dry riding window
19:00–09:00
14 hours dry; 1 window(s) in the next 14 hours
Drying laundry
Workable
0 sunny hours, 0 wet hours between 07:00 and 17:00
Sunrise viewing
05:58
67% cloud at sunrise — some cloud, still visible
Skin protection
7.5
Unprotected skin may burn in about 25 minutes
48-hour forecast
19:00
28°
2%
20:00
27°
1%
21:00
27°
1%
22:00
27°
4%
23:00
27°
12%
00:00
26°
23%
01:00
26°
29%
02:00
26°
27%
03:00
26°
22%
04:00
25°
16%
05:00
25°
12%
06:00
25°
8%
07:00
25°
6%
08:00
27°
5%
09:00
28°
6%
10:00
29°
6%
11:00
30°
4%
12:00
31°
2%
13:00
32°
0%
14:00
32°
0%
15:00
32°
0%
16:00
32°
0%
17:00
31°
0%
18:00
29°
0%
19:00
28°
2%
20:00
28°
6%
21:00
27°
11%
22:00
27°
18%
23:00
27°
28%
00:00
26°
38%
01:00
25°
43%
02:00
25°
37%
03:00
25°
24%
04:00
24°
14%
05:00
24°
8%
06:00
24°
4%
07:00
25°
2%
08:00
26°
1%
09:00
28°
1%
10:00
29°
2%
11:00
30°
3%
12:00
31°
5%
13:00
32°
8%
14:00
32°
13%
15:00
32°
20%
16:00
31°
24%
17:00
31°
22%
18:00
29°
17%
Days ahead
| Today | Low/High | Chance of rain | Rainfall | |
|---|---|---|---|---|
| Today 21/09 | Thunderstorm | 23°31° | 96% | 7.8 mm |
| Tomorrow 22/09 | Light drizzle | 25°32° | 29% | 0.1 mm |
| Wednesday 23/09 | Thunderstorm | 23°32° | 67% | 8.6 mm |
| Thursday 24/09 | Thunderstorm | 23°31° | 73% | 11.9 mm |
| Friday 25/09 | Light showers | 23°31° | 80% | 8.5 mm |
Monthly averages
Common questions
Will it rain in Vientiane today?
Yes. Rain is expected around 00:00–06:00, totalling roughly 7.8 mm.
How hot is it in Vientiane today?
Between 23°C and 31°C, with a felt maximum of 38°C.
What is the weather in Vientiane tomorrow?
Tomorrow: light drizzle, 25–32°C, with a 29% chance of rain.