If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Macapa: The hottest months are usually October and September with an average temp of 83°F, while the coldest months are January and February with an average of 79°F. The rainiest months in Macapa are March, April, May, and February, with each month seeing an average of 20 inches of rainfall.