How much snow has Big Sky gotten this season and over the last few ski seasons? Big Sky gets an average annual snowfall of 267" of snow per year and on average has 69 annual snowfall days. The current 10-year snowfall record is 26". Check out Big Sky historical snowfall using the grid below with average Big Sky snow stats that includes: Average Snowfall, Max Base Depth, Biggest Snowfall, Snowfall Days and Average Base Depth.