In December, the weather in Bridgewater is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Bridgewater has 10 cloudy, 8 partly cloudy, 6 rainy, 4 sunny, and 3 snowy 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 Bridgewater.