December in Medford is the coldest month of the year. In December, the weather in Medford is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Medford has 13 rainy, 8 sunny, 8 partly cloudy, and 2 cloudy days in December. The rains are usually heavy. December as well as January, February, March, and November is considered the most uncomfortable time to visit Medford.