May in Shuangyashan is the rainiest month of the year. In May, the weather in Shuangyashan is typically warm. Average daily high temperature in May is about 18 degrees above zero. On average, Shuangyashan has 17 rainy, 6 sunny, 4 cloudy, and 4 partly cloudy days in May. The rains are usually heavy. May as well as January, February, and December is considered the most uncomfortable time to visit Shuangyashan.