Yearly weather and climate in Vientiane, Laos
The yearly weather in Vientiane runs from around 18°C in January to 34°C in April. December is the driest month at 0 rainy days; September the wettest at 28. Here is the annual climate data, so you know what you are packing for.
Best time to visit
The best weather is typically in Jan, Feb, Nov, Dec, with mild temperatures and lower rainfall.
Sunshine
Expect up to 10.5 hours of clear skies in Apr, but only 7.4 hours in Aug. Pack sunglasses and SPF accordingly.
Rainfall
It rains the most in Sep (442mm over 28 days). A reliable rain jacket is a must-have if visiting then.
Day-to-night swings
Temperatures typically drop by 8°C from day to night. Make sure to pack layers for the evenings.
Average temperatures and rainfall
Daily highs and lows in Vientiane, averaged over 10 years of recorded weather, with the number of days it typically rains.
- 2882°1864°2Jan
- 3085°1967°2Feb
- 3290°2373°9Mar
- 3493°2576°8Apr
- 3392°2578°21May
- 3188°2577°25Jun
- 3188°2577°27Jul
- 3087°2576°27Aug
- 3086°2476°28Sep
- 3086°2373°15Oct
- 3086°2170°3Nov
- 2882°1864°0Dec
Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Dec is typically driest at 0 days (1mm); Sep the wettest at 28 days (442mm).
| Month | Average high | Average low | Rainy days | Total rainfall |
|---|---|---|---|---|
| Jan | 28°C | 18°C | 2 | 10mm |
| Feb | 30°C | 19°C | 2 | 19mm |
| Mar | 32°C | 23°C | 9 | 63mm |
| Apr | 34°C | 25°C | 8 | 74mm |
| May | 33°C | 25°C | 21 | 219mm |
| Jun | 31°C | 25°C | 25 | 324mm |
| Jul | 31°C | 25°C | 27 | 361mm |
| Aug | 30°C | 25°C | 27 | 423mm |
| Sep | 30°C | 24°C | 28 | 442mm |
| Oct | 30°C | 23°C | 15 | 163mm |
| Nov | 30°C | 21°C | 3 | 23mm |
| Dec | 28°C | 18°C | 0 | 1mm |
Weather data by Open-Meteo.com
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in Vientiane with Packola.
Get the app