March in Cannes is the windiest month of the year. In March, the weather in Cannes is typically warm. Average daily high temperature in March is about 12 degrees above zero. On average, Cannes has 14 sunny, 9 rainy, 7 partly cloudy, and 1 cloudy day in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Cannes.