January weather forecast in Wausau

January in Wausau is the most freezing month of the year. In January, the weather in Wausau is typically freezing. Average daily high temperature in January is about 8 degrees below zero. On average, Wausau has 23 cloudy, 6 snowy, and 2 sunny days in January. The snowfalls are usually light. January as well as March and April is considered the most uncomfortable time to visit Wausau.