Visiting local bars in Minamikyushu is more fun in good weather. These temperatures and rainfall averages can help you choose the best time for bar hopping. The hottest months are usually August and July with an average temp of 79°F, while the coldest months are January and February with an average of 54°F. The rainiest months in Minamikyushu are June, July, May, and September, with each month seeing an average of 16 inches of rainfall.