January weather forecast in Altdorf

January in Altdorf is the snowiest and the most freezing month of the year. In January, the weather in Altdorf is typically freezing. Average daily high temperature in January is about 2 degrees below zero. On average, Altdorf has 21 snowy, 4 sunny, 4 cloudy, and 2 partly cloudy days in January. The snowfalls are usually heavy.