I take each day as it comes. I don't worry about it being cold (just put on extra jumpers etc).
With regard to the ground being icy, if it feels slippery underfoot, it will be unsafe to attempt ladder work, so I don't. Obvious really.
In the winter I use hot water, at least as hot as I can put my hands in.
I don't normally have problems with water freezing unless the property is unheated inside, but if I do, I wipe the windows with a clean, dry cloth after mopping and blading.
John