What’s the weather at La Mongie / Barèges today? The current La Mongie / Barèges weather is: Cloudy, 27 C° base and 21 C° Summit, 9 km/h wind. Scroll down to Hour by Hour for an hourly La Mongie / Barèges weather forecast breakdown for a detailed La Mongie / Barèges weather and snow forecast for the next seven days.