January in Metz is the coldest month of the year. In January, the weather in Metz is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Metz has 14 rainy, 13 cloudy, 3 sunny, and 1 partly cloudy day in January. The rains are usually moderate. January as well as February, May, November, and December is considered the most uncomfortable time to visit Metz.