June in Beihai is the cloudiest month of the year. In June, the weather in Beihai is typically hot. Average daily high temperature in June is about 30 degrees above zero. On average, Beihai has 28 rainy, 1 sunny, and 1 cloudy day in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit Beihai.