January in Härnösand is the snowiest, the windiest, and the most freezing month of the year. In January, the weather in Härnösand is typically freezing. Average daily high temperature in January is about 3 degrees below zero. On average, Härnösand has 11 cloudy, 7 snowy, 7 partly cloudy, 5 sunny, and 1 rainy day in January. The snowfalls are usually moderate.