In December, the weather in Chalon-sur-Saone is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Chalon-sur-Saone has 13 rainy, 8 partly cloudy, 7 sunny, and 3 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 Chalon-sur-Saone.