January weather forecast in Dorchester

January in Dorchester is the rainiest and the windiest month of the year. In January, the weather in Dorchester is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Dorchester has 20 rainy, 5 sunny, 4 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as February, March, October, and November is considered the most uncomfortable time to visit Dorchester.