In December, the weather in Flic-en-Flac is typically warm. Average daily high temperature in December is about 27 degrees above zero. On average, Flic-en-Flac has 15 rainy, 11 sunny, 3 partly cloudy, and 2 cloudy days in December. The rains are usually heavy. December as well as January, February, and March is considered the most uncomfortable time to visit Flic-en-Flac.