What’s the weather at La Planche des Belles Filles today? The current La Planche des Belles Filles weather is: Mostly Sunny, 9 C° base and 9 C° Summit, 5 km/h wind. Scroll down to Hour by Hour for an hourly La Planche des Belles Filles weather forecast breakdown for a detailed La Planche des Belles Filles weather and snow forecast for the next seven days.