December weather forecast in Rosny-sous-Bois

December in Rosny-sous-Bois is the windiest month of the year. In December, the weather in Rosny-sous-Bois is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Rosny-sous-Bois has 16 rainy, 7 cloudy, 4 sunny, and 4 partly cloudy days in December. The rains are usually moderate. December as well as January, February, and November is considered the most uncomfortable time to visit Rosny-sous-Bois.