If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Akosombo: The hottest months are usually January and February with an average temp of 84°F, while the coldest months are August and July with an average of 77°F. The rainiest months in Akosombo are September, June, October, and May, with each month seeing an average of 8 inches of rainfall.