In March, the weather in Grandfontaine is typically cold. Average daily high temperature in March is about 7 degrees above zero. On average, Grandfontaine has 19 rainy, 6 sunny, 4 cloudy, and 2 partly cloudy 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 Grandfontaine.