What’s the weather at Praz de Lys Sommand today? The current Praz de Lys Sommand weather is: Mostly Sunny, 20 C° base and 15 C° Summit, 6 km/h wind. Scroll down to Hour by Hour for an hourly Praz de Lys Sommand weather forecast breakdown for a detailed Praz de Lys Sommand weather and snow forecast for the next seven days.