In June, the weather in Yonaguni is typically hot. Average daily high temperature in June is about 28 degrees above zero. On average, Yonaguni has 22 rainy, 3 sunny, 3 cloudy, and 2 partly cloudy days in June. The rains are usually heavy. June as well as January, February, March, and May is considered the most uncomfortable time to visit Yonaguni.