March in Chambersburg is the windiest month of the year. In March, the weather in Chambersburg is typically warm. Average daily high temperature in March is about 10 degrees above zero. On average, Chambersburg has 10 sunny, 9 rainy, 9 partly cloudy, and 3 cloudy days in March. The rains are usually heavy. March as well as January, February, November, and December is considered the most uncomfortable time to visit Chambersburg.