How much snow has Mont Ste-Marie gotten this season and over the last few ski seasons? Mont Ste-Marie gets an average annual snowfall of 63" of snow per year and on average has 21 snowfall days. Check out Mont Ste-Marie historical snowfall using the grid below with average Mont Ste-Marie snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.