January in Mechelen is the rainiest and the coldest month of the year. In January, the weather in Mechelen is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Mechelen has 19 rainy, 8 cloudy, and 4 sunny days in January. The rains are usually moderate. January as well as February, May, November, and December is considered the most uncomfortable time to visit Mechelen.