In March, the weather in Brattleboro is typically cold. Average daily high temperature in March is about 4 degrees above zero. On average, Brattleboro has 11 partly cloudy, 7 sunny, 6 cloudy, 4 rainy, and 3 snowy days in March. The rains are usually heavy. March as well as February, April, May, and October is considered the most uncomfortable time to visit Brattleboro.