If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Maringá: The hottest months are usually December and November with an average temp of 75°F, while the coldest months are July and June with an average of 65°F. The rainiest months in Maringá are January, February, December, and October, with each month seeing an average of 9 inches of rainfall.