If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Imadomari: 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 65°F. The rainiest months in Imadomari are June, May, August, and October, with each month seeing an average of 12 inches of rainfall.