Weather is probably a major factor when you plan your trip to Mikurajima-mura, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and September with an average temp of 78°F, while the coldest months are January and February with an average of 55°F. The rainiest months in Mikurajima-mura are June, October, September, and November, with each month seeing an average of 12 inches of rainfall.