If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Takashima: The hottest months are usually August and July with an average temp of 74°F, while the coldest months are January and February with an average of 40°F. The rainiest months in Takashima are July, December, September, and January, with each month seeing an average of 12 inches of rainfall.