How much snow has Val Mustair gotten this season and over the last few ski seasons? Val Mustair gets an average annual snowfall of 223cm of snow per year and on average has 22 annual snowfall days. The current 10-year snowfall record is 55cm. Check out Val Mustair historical snowfall using the grid below with average Val Mustair snow stats that includes: Average Snowfall, Max Base Depth, Biggest Snowfall, Snowfall Days and Average Base Depth.