How much snow has Dallenwil - Wirzweli gotten this season and over the last few ski seasons? Dallenwil - Wirzweli gets an average annual snowfall of 154cm of snow per year and on average has 15 snowfall days. Check out Dallenwil - Wirzweli historical snowfall using the grid below with average Dallenwil - Wirzweli snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.