January in Wisconsin Dells is the snowiest, the cloudiest, and the most freezing month of the year. In January, the weather in Wisconsin Dells is typically freezing. Average daily high temperature in January is about 6 degrees below zero. On average, Wisconsin Dells has 20 cloudy, 9 snowy, and 2 sunny days in January. The snowfalls are usually light. January as well as March, April, October, and November is considered the most uncomfortable time to visit Wisconsin Dells.