If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Minatitlán: 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 73°F. The rainiest months in Minatitlán are September, August, July, and October, with each month seeing an average of 13 inches of rainfall.