Myanmar, Laos, and Cambodia have a monsoon season that lasts from May to October. It usually rains heavily from July to September. There is less rain from October onwards. So the best time to visit these countries is during dryer months from November to April.
In Myanmar, from March to May, the dry zone of the central plains like Bagan and Mandalay can have temperatures up to 40°C. There is a festival held annually in November – people release handcrafted hot air balloons as a way to honor Buddhist and Hindu deities.
In Cambodia, we recommend traveling between December and February. This is when the weather is cooler and more pleasant, at around 25°C. This is also the peak travel season in Cambodia, temples can be crowded. If you can handle humidity, April to June can be a good time to travel to Cambodia – jungles are green, flowers bloom, and temple are much less crowded.
Laos is best visited between October and April. Be mindful of the burning season when planning a trip to Laos. The burning season is sometimes referred to as “smoky season” when local farmers burning old crops in the fields or burning patches of forest land to make way for new planting. The worst period occurs from mid-March to mid-April. This is also the hottest time of the year in Laos. If you are planning a river cruise trip in Laos, November to January is the best period when high water levels make passage easy along Laos’ main waterway.
Because of the similarities in religious beliefs, many versions of the water festival can be seen across Myanmar (Thingyan), Laos (Songkran), and Cambodia (Choul Chnam Thmey). This festival usually occurs around mid-April and people spray scented water for good luck. After that, there will be splashing of water as a way to pass on blessings. Travelers who enjoy local culture can find those experiences very interesting.
Read more about the best time to travel to Vietnam at the link.