May in Gejiu is the warmest month of the year. In May, the weather in Gejiu is typically warm. Average daily high temperature in May is about 24 degrees above zero. On average, Gejiu has 23 rainy, 4 sunny, 3 partly cloudy, and 1 cloudy day in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Gejiu.