Weather is probably a major factor when you plan your trip to Yonaguni, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 28°C, while the coldest months are January and February, with an average of 20°C. The rainiest months in Yonaguni are May, August, September and June, with each month seeing an average of 280 mm of rainfall.
