Laos’ weather ranges from tropical to sub-tropical and temperatures vary accordingly between the north and south as well as from season to season. The best time to travel is from November to February/March when the weather is dry and warm without being too hot. It can however get quite chilly in the north of the country during these months especially in the mountainous areas such as Luang Prabang and the Plain of Jars. From March, the temperature starts to warm up significantly, peaking in April/May, just before the rains come in June to signal the beginning of the humid wet season which runs until mid-October. Slightly lower rainfall occurs in the north of the country and as a result Vientiane tends to be wetter than Luang Prabang. For visitors travelling between the end of March and beginning of April, please note in the mountainous area where “slash and burn” cultivation remains the smoke may cause a haze forcing domestic flights to be delayed or cancelled.