Weather in Vientiane in september
Climate normals based on 10 years of historical data for Vientiane, Laos.
Average high
31°C
Average low
24°C
Rainfall
401 mm
26 rainy days
Sunshine
1.1h/day
Luftfuktighet
83%
How Hot Is Vientiane in september?
Vientiane steps back from peak heat in September — afternoon highs of 31°C and overnight lows of 24°C.
Sunshine Hours in september
Grey skies dominate Vientiane: 1.1h of sun a day, sun up between 5:55 am and 6:10 pm.
Does It Rain In Vientiane In september?
Torrential downpours dominate: Vientiane sees 401mm in 26 days.
Is Vientiane Humid In september?
Vientiane's air is saturated this month: humidity averages a sweltering 83%.
Wind In Vientiane In september
Vientiane's September is calm: typical wind speeds around 9 kph.
Cloud Cover In Vientiane In september
Heavy cloud blankets Vientiane in September — averaging 77% cover, with mostly overcast skies.
Cities With Similar Weather In september
Weather in Vientiane, month by month
| Month | High / Low | Regn | |
|---|---|---|---|
| Vädret i januari | 29°C / 18°C | 19mm | Details → |
| Vädret i februari | 31°C / 20°C | 19mm | Details → |
| Vädret i mars | 34°C / 24°C | 51mm | Details → |
| Vädret i april | 36°C / 26°C | 66mm | Details → |
| Vädret i maj | 34°C / 26°C | 243mm | Details → |
| Vädret i juni | 32°C / 25°C | 311mm | Details → |
| Vädret i juli | 31°C / 24°C | 416mm | Details → |
| Vädret i augusti | 30°C / 24°C | 484mm | Details → |
| Vädret i september | 31°C / 24°C | 401mm | |
| Vädret i oktober | 30°C / 22°C | 149mm | Details → |
| Vädret i november | 30°C / 21°C | 27mm | Details → |
| Vädret i december | 29°C / 18°C | 5mm | Details → |