December in Neenah is the cloudiest month of the year. In December, the weather in Neenah is typically freezing. Average daily high temperature in December is about zero. On average, Neenah has 10 partly cloudy, 8 cloudy, 7 sunny, 4 snowy, and 2 rainy days in December. The snowfalls are usually moderate. December as well as February, March, April, and October is considered the most uncomfortable time to visit Neenah.