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 87" of snow per year and on average has 34 snowfall days. Check out Ski Granby Ranch historical snowfall using the grid below with average Ski Granby Ranch snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.