How much snow has Spiazzi di Gromo gotten this season and over the last few ski seasons? Spiazzi di Gromo gets an average annual snowfall of 97cm of snow per year and on average has 7 snowfall days. Check out Spiazzi di Gromo historical snowfall using the grid below with average Spiazzi di Gromo snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.