Weather is only one factor, but it can really affect your travel plans, especially if you are planning a longer stay in Okinoerabujima. The hottest months are usually August and July with an average temp of 82°F, while the coldest months are January and February with an average of 64°F. The rainiest months in Okinoerabujima are June, May, August, and July, with each month seeing an average of 12 inches of rainfall.