January in Neunkirchen is the rainiest and the coldest month of the year. In January, the weather in Neunkirchen is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Neunkirchen has 21 rainy, 7 cloudy, and 3 sunny days in January. The rains are usually moderate. January as well as February, November, and December is considered the most uncomfortable time to visit Neunkirchen.