December in Angra dos Reis is the rainiest and the cloudiest month of the year. In December, the weather in Angra dos Reis is typically warm. Average daily high temperature in December is about 24 degrees above zero. On average, Angra dos Reis has 27 rainy and 4 sunny days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Angra dos Reis.