January in Marseilles is the cloudiest and the coldest month of the year. In January, the weather in Marseilles is typically warm. Average daily high temperature in January is about 10 degrees above zero. On average, Marseilles has 15 partly cloudy, 12 sunny, and 4 rainy days in January. The rains are usually light. January as well as February and December is considered the most uncomfortable time to visit Marseilles.