How much snow has Champex - Lac gotten this season and over the last few ski seasons? Champex - Lac gets an average annual snowfall of 313cm of snow per year and on average has 20 snowfall days. Check out Champex - Lac historical snowfall using the grid below with average Champex - Lac snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.