How much snow has Plattekill Mountain gotten this season and over the last few ski seasons? Plattekill Mountain gets an average annual snowfall of 87" of snow per year and on average has 24 snowfall days. Check out Plattekill Mountain historical snowfall using the grid below with average Plattekill Mountain snow stats that includes: Average Snowfall, Biggest Snowfall, Snowfall Days and Average Base Depth.