In reply to mypyrex:
It's all relative. It's Chamonix. It's September.
I've been training (running) here all week and spent hours at height. Not once has the waterproof come out of my pack.
You need to thank your lucky stars it's not pissed it down constantly this week, which could have easily happened!
Indeed, I see the distinct lack of precipitation and strong wind as a great positive. I'm in one of coolest places in Europe and I'm loving it.
Safe journey home.