December in Maastricht is the windiest month of the year. In December, the weather in Maastricht is typically cold. Average daily high temperature in December is about 5 degrees above zero. On average, Maastricht has 18 rainy, 8 cloudy, 4 sunny, and 1 partly cloudy day in December. The rains are usually moderate. December as well as January, February, and November is considered the most uncomfortable time to visit Maastricht.