If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Olinda: The hottest months are usually March and February, with an average temperature of 27°C, while the coldest months are August and July, with an average of 25°C. The rainiest months in Olinda are May, June, July and April, with each month seeing an average of 180 mm of rainfall.