What’s the weather at Obersaxen Mundaun today? The current Obersaxen Mundaun weather is: Fog, 8 C° base and 3 C° Summit, 5 km/h wind. Scroll down to Hour by Hour for an hourly Obersaxen Mundaun weather forecast breakdown for a detailed Obersaxen Mundaun weather and snow forecast for the next seven days.