December in Montreuil is the windiest month of the year. In December, the weather in Montreuil is typically cold. Average daily high temperature in December is about 7 degrees above zero. On average, Montreuil has 19 rainy, 7 cloudy, 4 sunny, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and November is considered the most uncomfortable time to visit Montreuil.