What’s the weather at Diemtigtal - Grimmialp today? The current Diemtigtal - Grimmialp weather is: Slightly cloudy, 16 C° base and C° Summit, 3 km/h wind. Scroll down to Hour by Hour for an hourly Diemtigtal - Grimmialp weather forecast breakdown for a detailed Diemtigtal - Grimmialp weather and snow forecast for the next seven days.