January in Hamelin is the snowiest and the coldest month of the year. In January, the weather in Hamelin is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Hamelin has 11 rainy, 10 cloudy, 6 partly cloudy, 3 sunny, and 1 snowy day in January. The rains are usually moderate. January as well as February, March, April, and October is considered the most uncomfortable time to visit Hamelin.