In May, the weather in Miyako-jima is typically warm. Average daily high temperature in May is about 26 degrees above zero. On average, Miyako-jima has 19 rainy, 5 sunny, 5 cloudy, and 2 partly cloudy days in May. The rains are usually heavy. May as well as January, February, October, and November is considered the most uncomfortable time to visit Miyako-jima.