What’s the weather at Alagna Valsesia - Monterosa Ski today? The current Alagna Valsesia - Monterosa Ski weather is: Slightly cloudy, 23 C° base and 12 C° Summit, 7 km/h wind. Scroll down to Hour by Hour for an hourly Alagna Valsesia - Monterosa Ski weather forecast breakdown for a detailed Alagna Valsesia - Monterosa Ski weather and snow forecast for the next seven days.