Vientiane has a tropical savanna climate with distinct wet and dry seasons. The wet season runs from May to October, while the dry season runs from November to April. The city experiences high temperatures throughout the year, with an average temperature of 27.5°C (81.5°F) and a humidity level of 79%. The hottest months are from March to May, while the coldest months are from December to February. Vientiane receives an annual precipitation of 1,435 mm (56.5 in) and has an average of 120 rainy days per year. The best time to visit Vientiane is during the dry season, from November to February, when the weather is cooler and drier.
Best Time to Visit
The best time to visit Vientiane is during the dry season, which runs from November to February. During this time, the weather is cooler and drier with low humidity levels, making it more comfortable for visitors to explore the city. The average temperature during this time ranges from 20°C (68°F) to 28°C (82°F), and there is minimal rainfall. It is important to note that this is also the peak tourist season, so prices for accommodations and attractions may be higher than during the wet season.
Basic Information for Vientiane Climate
| Climate Type |
Tropical savanna climate |
| Average Temperature |
27.5°C (81.5°F) |
| Highest Temperature |
34°C (93°F) |
| Lowest Temperature |
21°C (70°F) |
| Annual Precipitation |
1,435 mm (56.5 in) |
| Wettest Month |
September |
| Driest Month |
February |
| Humidity |
79% |
| Average Wind Speed |
5.5 km/h (3.4 mph) |
| Dominant Wind Direction |
Southwest |
| Sunshine Hours per Year |
2,400 hours |
| Number of Rainy Days |
120 days |
| Hottest Month |
April (average temperature: 30°C) |
| Coldest Month |
January (average temperature: 24°C) |
| Best Time to Visit |
November to February |
Monthly Average Temperature and Rainfall
| Month |
Average Temperature (°C) |
Average Rainfall (mm) |
Highest Temperature (°C) |
Lowest Temperature (°C) |
Total Rainfall (mm) |
| January |
20 |
12 |
28 |
12 |
34 |
| February |
23 |
29 |
32 |
15 |
59 |
| March |
27 |
65 |
36 |
20 |
169 |
| April |
28 |
112 |
40 |
23 |
336 |
| May |
28 |
212 |
39 |
25 |
651 |
| June |
27 |
255 |
36 |
24 |
766 |
| July |
26 |
274 |
33 |
24 |
809 |
| August |
26 |
291 |
32 |
24 |
747 |
| September |
26 |
242 |
32 |
23 |
551 |
| October |
25 |
84 |
31 |
21 |
206 |
| November |
22 |
20 |
29 |
16 |
27 |
| December |
20 |
9 |
27 |
12 |
11 |
Temperature of Four Seasons
| Season |
Temperature (°C) |
Details and Characteristics |
| Winter (Dec-Feb) |
16-27 |
The weather is generally dry and mild during the day, with cooler temperatures at night. The humidity is lower compared to other seasons. This is considered the peak tourist season due to the pleasant weather. |
| Spring (Mar-May) |
22-36 |
The weather gets progressively hotter as spring progresses, with May being the hottest month. The humidity starts to increase during this season, making the weather feel more oppressive. Occasional rain showers and thunderstorms are common, particularly in May. |
| Summer (Jun-Aug) |
24-33 |
This is the wettest season, with frequent rain showers and occasional flooding. The humidity is high, making the weather feel hot and sticky. Despite the rainy weather, there are still plenty of sunny days. |
| Fall (Sep-Nov) |
21-32 |
The weather starts to cool down during this season, with November being the coolest month. The humidity starts to decrease, making the weather feel more comfortable. Occasional rain showers and thunderstorms are still common, particularly in September and October. |
Note: The temperatures listed are approximate and may vary based on factors such as humidity, precipitation, and location within the city. The characteristics listed are general and may not apply to every day during each season.
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