September in Dumaguete is the cloudiest month of the year. In September, the weather in Dumaguete is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Dumaguete has 27 rainy, 2 cloudy, and 1 partly cloudy day in September. The rains are usually heavy. September as well as January, March, April, and May is considered the most uncomfortable time to visit Dumaguete.