December weather forecast in Washington

December in Washington is the coldest month of the year. In December, the weather in Washington is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Washington has 10 rainy, 10 sunny, 10 partly cloudy, and 1 cloudy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Washington.