January in Zell am See is the snowiest, the sunniest, and the most freezing month of the year. In January, the weather in Zell am See is typically freezing. Average daily high temperature in January is about zero. On average, Zell am See has 10 snowy, 8 sunny, 7 partly cloudy, 5 cloudy, and 1 rainy day in January. The snowfalls are usually heavy.