May in Romblon is the hottest month of the year. In May, the weather in Romblon is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Romblon has 22 rainy, 8 sunny, and 1 cloudy 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 Romblon.