If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Mandurriao: The hottest months are usually May and April with an average temp of 82°F, while the coldest months are February and January with an average of 79°F. The rainiest months in Mandurriao are July, September, August, and October, with each month seeing an average of 13 inches of rainfall.