December in Lille is the windiest month of the year. In December, the weather in Lille is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Lille has 14 rainy, 11 cloudy, 4 sunny, and 2 partly cloudy days in December. The rains are usually moderate. December as well as January, February, March, and November is considered the most uncomfortable time to visit Lille.