April in Xieng Khouang is the warmest month of the year. In April, the weather in Xieng Khouang is typically warm. Average daily high temperature in April is about 26 degrees above zero. On average, Xieng Khouang has 23 rainy, 4 sunny, 2 cloudy, and 1 partly cloudy day in April. The rains are usually heavy. April as well as May, June, July, and August is considered the most uncomfortable time to visit Xieng Khouang.