Planning for the weather is a good way to make your trip to Angra dos Reis relaxing and enjoyable, especially when you’re splurging. The hottest months are usually February and January, with an average temperature of 25°C, while the coldest months are July and August, with an average of 20°C. The rainiest months in Angra dos Reis are January, December, March and February, with each month seeing an average of 254 mm of rainfall.