How much snow has Gaißau Hintersee gotten this season and over the last few ski seasons? Gaißau Hintersee gets an average annual snowfall of 68cm of snow per year and on average has 5 snowfall days. Check out Gaißau Hintersee historical snowfall using the grid below with average Gaißau Hintersee snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.