In December, the weather in Greenwood is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Greenwood has 14 rainy, 9 cloudy, 4 snowy, 3 sunny, and 1 partly cloudy day in December. The rains are usually heavy. December as well as March, April, May, and November is considered the most uncomfortable time to visit Greenwood.