What’s the weather at Bellevaux - Hirmentaz today? The current Bellevaux - Hirmentaz weather is: Mostly Sunny, 13 C° base and 12 C° Summit, 1 km/h wind. Scroll down to Hour by Hour for an hourly Bellevaux - Hirmentaz weather forecast breakdown for a detailed Bellevaux - Hirmentaz weather and snow forecast for the next seven days.