Laos Weather & Climate: Monthly Averages

Laos has a tropical monsoon climate, characterized by a distinct rainy season from May to October. It also experiences a refreshingly cool and dry season from November to February. In March and April there is the hot dry season While monsoons generally occur across the country at the same time, their exact start can vary slightly from year to year and can have regional differences.

Temperature Variations

Large temperature variations occur throughout the year. The Mekong areas experience average temperatures of around 40°C (104°F) during March and April, while in January, the uplands of Xiangkhoang and Phôngsali can reach lows of 5°C (41°F) or even lower.

During December, Laos displays a wide climatic variation: while Xam Nua experiences daytime temperatures of a comfortable 21°C (70°F), Ban Dondét enjoys a warm 33°C (91°F). At night, Xam Nua cools down to 10°C (50°F), while Ban Dondét remains relatively mild at 22°C (72°F). This month is the coolest time of the year for Luang Prabang.

Precipitation varies from an average of 5.8 mm (0.2 in) in Savannakhet to as much as 35 mm (1.4 in) in Louang Namtha in December. Sunlight levels remain relatively consistent, with Luang Prabang receiving approximately 174 hours of sunshine.

April: The Hottest Month

Temperatures in Laos begin to rise in April. Daytime temperatures range from a comfortable 28°C (82°F) in Muang Phônsavan to a hot 37°C (99°F) in Ban Dondét. At night, temperatures drop to 17°C (63°F) in Muang Phônsavan, while Ban Dondét remains warm at 26°C (79°F). Light, breathable clothing is advisable for travelers, as April is the hottest month of the year.

Rainfall patterns in April vary; while Attapu sees moderate rainfall of 68 mm (2.7 in), Ban Tayun experiences heavier showers, averaging 217 mm (8.5 in). Despite this, Luang Prabang still enjoys ample sunshine, with nearly 197 hours of sunlight.

Best time to Visit Laos

In general, the best time to visit Laos is during the months of November to March. Temperatures are then pleasant in most parts of Laos and there is the least rainfall. However, July and August can also be a good time. Even though these months fall in the rainy season, the showers are often only short and there can be a pleasant cool down. The hottest months are April and May are not recommended.

Since weather conditions differ across Laos, it is advisable to check the specific region you plan to visit.