January in Rüsselsheim is the coldest month of the year. In January, the weather in Rüsselsheim is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Rüsselsheim has 15 cloudy, 10 rainy, 4 sunny, and 2 partly cloudy days in January. The rains are usually light. January as well as February, November, and December is considered the most uncomfortable time to visit Rüsselsheim.