June in Lạng Sơn is the cloudiest and the hottest month of the year. In June, the weather in Lạng Sơn is typically hot. Average daily high temperature in June is about 28 degrees above zero. On average, Lạng Sơn has 29 rainy and 1 sunny 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 Lạng Sơn.