Climate almanac
Vientiane
Vientiane Prefecture, Laos · 17.97°, 102.60°
What is the weather like in Vientiane in September?
In September, Vientiane is typically 90°F (32°C) during the day and 78°F (25°C) at night. The month brings about 12 in (311 mm) of precipitation in total.
- Average high90°F (32°C)
- Average low78°F (25°C)
- Precipitation12 in (311 mm)
- Clear or mostly clear days3
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)