Ahh, perhaps. I'm not real fond of the small holes at the bottom of the unit, I get a lot of tree pollen / debris which could clog them.
I don't get your weather, I do get some snow, but usually melts in 24hrs, which is funny as when it melts, usually on a sunny day, I'm reporting rain.
It would take quite a bit to freeze the bucket in place. or do damage IMHO.