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