September in Ang Thong is the rainiest month of the year. In September, the weather in Ang Thong is typically hot. Average daily high temperature in September is about 33 degrees above zero. On average, Ang Thong has 25 rainy, 4 cloudy, and 1 partly cloudy day in September. The rains are usually heavy. September as well as April, May, June, and July is considered the most uncomfortable time to visit Ang Thong.