January, February
December, January, February are the driest months of the year throughout the country though you can see a little rain in Feb. The temperatures are comfortably warm, except the north of country where it can be quite cold in January. The water level of Mekong river in Laos is always high in January, making it an ideal time to explore the country’s waterways.
March – April
The country’s dry season continues until end of April. The temperatures throughout the country rises to over 30°C in many places; although cooler conditions can still be found in the highlands. But the water of Mekong river starts getting low.
May, June
It is still dry during the first half of the May but not anymore by the latter one. As of June, the country gets wetter as the heavy rains take place more often throughout. The rains are not long lasting and you still can expect lot of sunshine in south of the country. Temperatures are also higher than they were in the previous recent months.
July, August, September
The wet season is in full swing from July. The entire country see more heavy rains during this time than ever, and rainfall reaches its peak in September. Waterfalls and lush green landscapes are in the best time to admire, although heavy rains make your remote travel troublesome. The temperatures are different among different months and areas. During August, it is only around 20 degree Celsius through out the country, 10 degree Celsius lower than July and September. Thanks to heavy rains over the months, river level of Mekong has gone up significantly before the dry season approaches.
October, November, December
Most parts of Lao starts getting drier as of October. It is also a good month to visit the country, which features stunning green landscaped created by heavy rains of the wet season.
The 5-month dry season really comes back as of early November. The entire country is dry again and waterlevel of Mekong river comes to its peak. Besides, ideal temperatures make the 3 months make the best time to visit the country for all.