In March, the weather in Yonaguni is typically warm. Average daily high temperature in March is about 22 degrees above zero. On average, Yonaguni has 18 rainy, 5 cloudy, 4 sunny, and 4 partly cloudy days in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Yonaguni.