If you're hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Macapa: The hottest months are usually October and September, with an average temperature of 28°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Macapa are March, April, May and February, with each month seeing an average of 500 mm of rainfall.