January in Miyako-jima is the rainiest and the coldest month of the year. In January, the weather in Miyako-jima is typically warm. Average daily high temperature in January is about 19 degrees above zero. On average, Miyako-jima has 24 rainy, 4 sunny, and 3 cloudy days in January. The rains are usually heavy. January as well as February, May, October, and November is considered the most uncomfortable time to visit Miyako-jima.