July in Xam Neua is the rainiest month of the year. In July, the weather in Xam Neua is typically hot. Average daily high temperature in July is about 28 degrees above zero. On average, Xam Neua has 28 rainy, 2 cloudy, and 1 sunny day in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Xam Neua.