Whether you're visiting Vientiane in Laos during the peak of April (37°C (99°F)) or the cooler months around December (30°C (86°F)), knowing what to pack starts with understanding the local climate. Our overview is based on data from Vientiane, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
High temperatures are a constant in Vientiane, especially in Vientiane, with average maximums staying above 30°C (86°F) all year long.
March, April and May are generally the hottest months of the year.
When it comes to rainfall, Vientiane sees significant variations throughout the year. August tends to be the wettest, receiving 399 mm (16 in) of rain, while December is much drier with just 10 mm (0.4 in). Travelers should note that the rainy season falls during May, June, July, August and September, bringing substantial precipitation ranging from 266 mm (10 in) to 399 mm (16 in) monthly. The period of January, February and December is the driest, with precipitation levels below 18 mm (0.7 in).
December is the sunniest period, with ideal conditions for exploring the region and all it has to offer.
