It's windy here, but i'm going for it. I think we fear customers more than we really need to sometimes. The windows will be fine. Go for it. What's the worst that can happen? ? ?
apart from ya £400 pole blowing over and snapping in 'arf. GOOOOO FOOOOORRRRR ITTTTTTTT 
That is probably the best attitude, but I'm soft! I don't mind working in inclement weather, I don't mind losing the odd customer, but I guess I'm frightened up looking like an idiot in front of people; not that that usually bothers me; but it does when it comes to cleaning windows in the weather I can see from where I'm sitting.
I'm getting dragged off to Ikea instead instead, and believe me, I'd rather have my finger nails pulled out than go to that place!