Weather in Vientiane in September
In an average September, Vientiane sees a daily high around 31°C and a low around 25°C, based on 1980–2026 of local climate records.
| Average high | 31°C |
|---|---|
| Typical high range | 29°C to 34°C |
| Average low | 25°C |
| Typical low range | 24°C to 26°C |
| Average daily precipitation | 10 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
37°C
2018-09-16
Lowest
24°C
2004-09-10
Low
Highest
27°C
2016-09-04
Lowest
21°C
1986-09-25
Feels-like
Highest
63°C
2023-09-03
Lowest
24°C
2004-09-10
Humidity
Highest
26.4 g/m³
2019-09-06
Lowest
17.6 g/m³
1986-09-21
Wind
Highest
22 km/h
2005-09-14
Lowest
3 km/h
2004-09-12
Gust
Highest
64 km/h
2005-09-14
Lowest
13 km/h
1984-09-11
Precip
Wettest
484 mm
2024
Driest
118 mm
2019
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