I recently hiked up to the Muir Snowfield on Rainier (aka Tahoma) in Washington State; I'd been there in August and September of prior years but this time it was shocking to see how much of the snowfield was just gone; I was looking at bare glacier, complete with crevasses, when in years past that was usually still covered by several meters of snow.

Usually in September the weather will be noticeably cooler, and usually above 10k feet it's freezing- but on the day of my visit it was t-shirt weather above the cloud deck and the usual quiet was instead the sound of water running under the ice.

This is not a Swiss thing, it's an everywhere thing