If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Manacapuru: The hottest months are usually September and October, with an average temperature of 28°C, while the coldest months are April and June, with an average of 26°C. The rainiest months in Manacapuru are March, April, February and May, with each month seeing an average of 466 mm of rainfall.