December in Sao Goncalo is the cloudiest month of the year. In December, the weather in Sao Goncalo is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Sao Goncalo has 18 rainy, 5 sunny, 5 cloudy, and 3 partly cloudy days in December. The rains are usually heavy. December as well as January, February, March, and November is considered the most uncomfortable time to visit Sao Goncalo.