March in Dien Bien Phu is the windiest and the sunniest month of the year. In March, the weather in Dien Bien Phu is typically warm. Average daily high temperature in March is about 27 degrees above zero. On average, Dien Bien Phu has 15 partly cloudy, 11 sunny, 4 rainy, and 1 cloudy day in March. The rains are usually light.