In December, the weather in Des Moines is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Des Moines has 11 partly cloudy, 10 sunny, 6 cloudy, 3 snowy, and 1 rainy day in December. The snowfalls are usually light. December as well as January, February, March, and April is considered the most uncomfortable time to visit Des Moines.