In reply to Cheese Monkey:
Could well be. We had a great spell here about a month ago, when it got colder after the first heatwave. It'll mean that more flexibility is needed, ie not: I'm going to do the Matterhorn (or whatever) in these four days, but rather: I'm going to spend three weeks in the Alps, move around according to the conditions, and go sport climbing or do long hikes if there's any doubt about the conditions higher up.
Scary, that testing holds isn't much help any more when the whole part of the face you're climbing could just slide away beneath you without warning.
A good site for very up to date descriptions of conditions on specific Swiss mountains is this one:
https://www.gipfelbuch.ch/gipfelbuch/verhaeltnisse
You just enter the mountain you're interested in, and get recent accounts of ascents by various routes. It's in German, but Google translate should provide clear enough translations. Free, but you have to register.
Post edited at 16:10