In March, the weather in Northampton is typically cold. Average daily high temperature in March is about 6 degrees above zero. On average, Northampton has 10 partly cloudy, 8 sunny, 6 rainy, 5 cloudy, and 2 snowy days in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Northampton.