Best Time to Go
The best time to visit Laos is from November to January when the temperature is at its coldest. Temperatures in the far north of the country, on the other hand, can get pretty cold in the evenings, occasionally dropping close to freezing.
You can visit Laos at any time of year. The only months to avoid are March and April, when the heating season culminates in-field burning, resulting in air that is as smoky as it is humid. The cool season lasts from October through February. The warmest months are March, April, and May, and the rainy season begins in May and lasts through June.
If you're traveling between May and September, bring a rain jacket or poncho. While it is unlikely that it will rain all day every day, it is very likely that you will have afternoon showers.