December in Syracuse is the windiest month of the year. In December, the weather in Syracuse is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, Syracuse has 9 cloudy, 7 rainy, 7 partly cloudy, 6 snowy, and 2 sunny days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Syracuse.