What’s the weather at Spiazzi di Gromo today? The current Spiazzi di Gromo weather is: Mostly Sunny, 14 C° base and 11 C° Summit, 4 km/h wind. Scroll down to Hour by Hour for an hourly Spiazzi di Gromo weather forecast breakdown for a detailed Spiazzi di Gromo weather and snow forecast for the next seven days.