March in Mammoth Lakes is the rainiest month of the year. In March, the weather in Mammoth Lakes is typically cold. Average daily high temperature in March is about 3 degrees above zero. On average, Mammoth Lakes has 11 partly cloudy, 9 sunny, 5 rainy, 5 cloudy, and 1 snowy day in March. The rains are usually moderate. March as well as January, February, April, and November is considered the most uncomfortable time to visit Mammoth Lakes.