If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Benin City: The hottest months are usually January and February, with an average temperature of 28°C, while the coldest months are August and July, with an average of 26°C. The rainiest months in Benin City are September, June, July and August, with each month seeing an average of 348 mm of rainfall.