If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Cagayan de Oro: The hottest months are usually May and April with an average temp of 82°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Cagayan de Oro are June, January, May, and July, with each month seeing an average of 14 inches of rainfall.