How much snow has Ski Granby Ranch gotten this season and over the last few ski seasons? Ski Granby Ranch gets an average annual snowfall of 94" of snow per year and on average has 36 annual snowfall days. The current 10-year snowfall record is 20". Check out Ski Granby Ranch historical snowfall using the grid below with average Ski Granby Ranch snow stats that includes: Average Snowfall, Max Base Depth, Biggest Snowfall, Snowfall Days and Average Base Depth.