June in Thanh Hoa is the cloudiest and the hottest month of the year. In June, the weather in Thanh Hoa is typically hot. Average daily high temperature in June is about 32 degrees above zero. On average, Thanh Hoa has 22 rainy, 7 cloudy, and 1 sunny 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 Thanh Hoa.