In reply to ianstevens:
There are plenty of examples from recent years that prove your point:
Summer 2006 was roasting with a 2 month sustained heatwave in June and July. The following winter snowfall was very low, however, due to the wet late spring and summer period, people climbed the Ginat in August 2007.
In early 2016, snow cover was well down on average across the Alps and yet the spring and early summer were cool and wet and cover on the glaciers was good that summer.
It all depends........
Also, disregarding alpinism for a moment, it needs to precipitate a lot this spring and summer across Europe due to the current low soil moisture, otherwise any heatwaves this summer will be amplified quite a bit.