In October, the weather in Whistler is typically cold. Average daily high temperature in October is about 6 degrees above zero. On average, Whistler has 9 rainy, 9 cloudy, 7 partly cloudy, 5 sunny, and 1 snowy day in October. The rains are usually heavy. October as well as February, March, April, and May is considered the most uncomfortable time to visit Whistler.