January weather forecast in Dumai

January in Dumai is the cloudiest month of the year. In January, the weather in Dumai is typically hot. Average daily high temperature in January is about 31 degrees above zero. On average, Dumai has 24 rainy, 4 cloudy, and 3 partly cloudy 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 Dumai.