Climate Chart of Vientiane, Laos
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Vientiane, Laos, the climate data cover 2013–2023. The monthly mean temperature is 26.1 °C, with the warmest monthly mean in April at 28.9 °C and the coolest in January / December at 22.1 °C. Daily sunshine and rainfall averages also vary across the year, giving visitors useful month-specific context while remaining averages rather than guarantees about conditions on any particular day.
Climate overview
Temperature
Monthly mean temperatures reach their high in April, at 28.9 °C; this is a monthly average, not a typical daytime maximum. The coolest monthly means occur in January / December, at 22.1 °C, so visitors prioritising cooler monthly averages may consider those months. Across the calendar-month means, the unweighted mean is 26.1 °C; it is not a day-weighted annual average.
Rain
Mean daily rainfall is highest in August, at 13.33 mm/day, and lowest in December, at 0.30 mm/day. Those averages can help frame plans, but lower mean rainfall does not guarantee dry days or describe how often rain occurs. The unweighted mean across monthly daily-rainfall means is 5.18 mm/day; these are daily means, not monthly rainfall totals.
Sunshine
Mean daily sunshine reaches its highest monthly average in April, at 10.56 hours/day, and its lowest in August, at 6.95 hours/day. These figures can help with outdoor planning, but sunshine duration is not the same as day length. The unweighted mean across the monthly sunshine averages is 9.18 hours/day per day.
Best Travel Time Guide for Vientiane, Laos: Ideal Seasons and Weather Insights
For visitors prioritising lower average rainfall, December is the conditional option in the supplied data, with mean daily rainfall of 0.30 mm/day; this does not rule out wet days, so retain flexible plans. If travelling in August, when mean daily rainfall is 13.33 mm/day, consider rain-ready clothing and keep outdoor plans adaptable. These figures describe daily averages, not rain frequency or monthly totals. Visitors seeking cooler monthly mean temperatures can use January / December as a guide, when the mean is 22.1 °C. For daylight outdoor planning, April has the highest mean daily sunshine at 10.56 hours/day, while August has the lowest at 6.95 hours/day. These are separate criteria rather than a single best-time ranking, and sunshine hours do not indicate day length or guarantee clear conditions.
Climate Data Overview for Vientiane, Laos
Explore the comprehensive climate data for Vientiane, Laos. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | 22.1 | 0.47 | 0.00 | 9.65 |
| Feb | 23.9 | 0.50 | 0.00 | 10.20 |
| Mar | 27.4 | 1.33 | 0.00 | 10.41 |
| Apr | 28.9 | 2.22 | 0.00 | 10.56 |
| May | 28.6 | 6.57 | 0.00 | 9.73 |
| Jun | 27.7 | 8.71 | 0.00 | 8.39 |
| Jul | 27.2 | 12.52 | 0.00 | 7.55 |
| Aug | 26.8 | 13.33 | 0.00 | 6.95 |
| Sep | 26.6 | 11.18 | 0.00 | 8.06 |
| Oct | 26.1 | 4.07 | 0.00 | 9.33 |
| Nov | 25.2 | 0.94 | 0.00 | 9.71 |
| Dec | 22.1 | 0.30 | 0.00 | 9.56 |
| Average | 26.1 | 5.18 | 0.00 | 9.18 |
