January in Dumaguete is the rainiest and the coldest month of the year. In January, the weather in Dumaguete is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Dumaguete has 28 rainy and 3 sunny days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Dumaguete.