Weather in Vientiane, Vientiane Prefecture, Laos in September
In an average September, Vientiane sees a daily high around 30°C and a low around 23°C, based on 1981–2026 of local climate records.
| Average high | 30°C |
|---|---|
| Typical high range | 28°C to 32°C |
| Average low | 23°C |
| Typical low range | 22°C to 24°C |
| Average daily precipitation | 8 mm |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
35°C
2015-09-20
Lowest
24°C
1997-09-27
Low
Highest
26°C
2020-09-03
Lowest
18°C
1997-09-28
Feels-like
Highest
52°C
2015-09-20
Lowest
24°C
1997-09-27
Humidity
Highest
24.3 g/m³
2024-09-30
Lowest
16.3 g/m³
1997-09-28
Wind
Highest
33 km/h
2016-09-14
Lowest
4 km/h
2017-09-14
Precip
Wettest
376 mm
2003
Driest
89 mm
2006
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