If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Koforidua: The hottest months are usually January and February with an average temp of 82°F, while the coldest months are August and July with an average of 76°F. The rainiest months in Koforidua are September, June, October, and May, with each month seeing an average of 9 inches of rainfall.