May in Jolo is the hottest month of the year. In May, the weather in Jolo is typically hot. Average daily high temperature in May is about 28 degrees above zero. On average, Jolo has 21 rainy, 6 sunny, 3 partly cloudy, and 1 cloudy day in May. The rains are usually moderate. May as well as January, June, July, and August is considered the most uncomfortable time to visit Jolo.