December in Sturgeon Bay is the cloudiest month of the year. In December, the weather in Sturgeon Bay is typically freezing. Average daily high temperature in December is about zero. On average, Sturgeon Bay has 11 partly cloudy, 9 cloudy, 5 sunny, 4 snowy, and 2 rainy days in December. The snowfalls are usually moderate. December as well as March, April, May, and October is considered the most uncomfortable time to visit Sturgeon Bay.