In March, the weather in Squamish is typically cold. Average daily high temperature in March is about 3 degrees above zero. On average, Squamish has 14 cloudy, 6 rainy, 6 partly cloudy, 3 sunny, and 2 snowy 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 Squamish.