May in Tioman is the hottest month of the year. In May, the weather in Tioman is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Tioman has 19 rainy, 5 sunny, 4 partly cloudy, and 3 cloudy days in May. The rains are usually moderate. May as well as January, February, March, and April is considered the most uncomfortable time to visit Tioman.