How much snow has Dartmouth Skiway gotten this season and over the last few ski seasons? Dartmouth Skiway gets an average annual snowfall of 56" of snow per year and on average has 16 snowfall days. Check out Dartmouth Skiway historical snowfall using the grid below with average Dartmouth Skiway snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.