How much snow has Mijanès - Donezan gotten this season and over the last few ski seasons? Mijanès - Donezan gets an average annual snowfall of 162cm of snow per year and on average has 15 snowfall days. Check out Mijanès - Donezan historical snowfall using the grid below with average Mijanès - Donezan snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.