November in Chelmsford is the cloudiest month of the year. In November, the weather in Chelmsford is typically warm. Average daily high temperature in November is about 9 degrees above zero. On average, Chelmsford has 14 rainy, 9 cloudy, 4 partly cloudy, and 3 sunny days in November. The rains are usually light. November as well as January, February, April, and July is considered the most uncomfortable time to visit Chelmsford.