What’s the weather at Corno del Renon / Rittner Horn today? The current Corno del Renon / Rittner Horn weather is: Clear, 17 C° base and C° Summit, 8 km/h wind. Scroll down to Hour by Hour for an hourly Corno del Renon / Rittner Horn weather forecast breakdown for a detailed Corno del Renon / Rittner Horn weather and snow forecast for the next seven days.