January in Bad Harzburg is the snowiest and the coldest month of the year. In January, the weather in Bad Harzburg is typically cold. Average daily high temperature in January is about zero. On average, Bad Harzburg has 15 rainy, 8 snowy, 6 cloudy, and 2 sunny days in January. The rains are usually moderate. January as well as February, March, October, and November is considered the most uncomfortable time to visit Bad Harzburg.