December in Araruama is the cloudiest month of the year. In December, the weather in Araruama is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Araruama has 11 rainy, 9 partly cloudy, 7 sunny, and 4 cloudy days in December. The rains are usually heavy. December as well as January, March, and November is considered the most uncomfortable time to visit Araruama.