December in Araruama is the rainiest 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 22 rainy, 4 sunny, 4 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and November is considered the most uncomfortable time to visit Araruama.