Laos has one wet season between May and September or October - temperatures at this time fall between 75-88°F (24-31°C), with high humidity and rainfall of 9.6 inches thanks to the southwestern monsoons.
During the monsoons, Laos experiences heavy but thankfully short showers, making most roads impassable and flooding many riverside areas, but also making more of the Mekong River navigable to watercraft.
The rest of the year is dry and rather sunny - starting from the cool, dry season of November to February, averaging 62-84°F (17-29°C) as cooler winds blow in from China, reaching peak temperatures of 68-90°F (20-32°C) between February and April.
To see Laos at its most comfortable, visit during the cool, dry season from November to February - rainfall is at its lowest and the weather is at its best behavior.
Laos' mountainous regions experience dramatic temperature drops throughout the year, so bring warmer clothing if you're planning to visit Xieng Khuong Province and other highland areas.
Choose a location below for the weather conditions in its vicinity.
Links labeled "NOAA" go to current weather forecasts made by the National Oceanic and Atmospheric Administration, under the auspices of the U.S. government.
Links labeled "WWIS" go to current weather forecasts made by the World Meteorological Organization's World Weather Information Service, under the auspices of the United Nations.
You can wear loose cotton fabrics all year round, but bring warmer clothing if visiting during the cool and dry season, or if you're going up to the highlands. Bring rainwear and an umbrella if you're in town during the monsoons.