May in Shantou is the cloudiest month of the year. In May, the weather in Shantou is typically warm. Average daily high temperature in May is about 26 degrees above zero. On average, Shantou has 20 rainy, 9 cloudy, and 2 sunny days in May. The rains are usually heavy. May as well as June, July, and August is considered the most uncomfortable time to visit Shantou.