June in Luang Namtha is the cloudiest month of the year. In June, the weather in Luang Namtha is typically warm. Average daily high temperature in June is about 26 degrees above zero. On average, Luang Namtha has 29 rainy and 1 cloudy day in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit Luang Namtha.