Planning for the weather is an important factor for making your trip to Cagayan de Oro a success, especially when you’re splurging. 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.