Weather will likely play an important role when you plan your trip to Macapa, and keep in mind that cheaper options are usually available when the weather isn't as good. 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.