January in Bandar Seri Begawan is the cloudiest month of the year. In January, the weather in Bandar Seri Begawan is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Bandar Seri Begawan has 28 rainy, 2 cloudy, and 1 sunny day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Bandar Seri Begawan.