May in Kuala Belait is the hottest month of the year. In May, the weather in Kuala Belait is typically hot. Average daily high temperature in May is about 30 degrees above zero. On average, Kuala Belait has 28 rainy, 2 cloudy, and 1 sunny day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Kuala Belait.