December in Les Mureaux is the windiest month of the year. In December, the weather in Les Mureaux is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Les Mureaux has 14 rainy, 10 cloudy, 5 sunny, and 2 partly cloudy days in December. The rains are usually light. December as well as January, February, March, and May is considered the most uncomfortable time to visit Les Mureaux.