June in Zhoushan is the rainiest and the cloudiest month of the year. In June, the weather in Zhoushan is typically warm. Average daily high temperature in June is about 24 degrees above zero. On average, Zhoushan has 21 rainy, 6 cloudy, and 3 sunny days in June. The rains are usually heavy. June as well as January, February, March, and November is considered the most uncomfortable time to visit Zhoushan.