In Scotland as long as there are light winds we will ski all year round which includes freezing conditions, we have made a rule that if the ice is over 1/2" thick we won't break it to ski, most of us wear dry suits but some wear good wetsuits and we carry a bucket of hot water to warm our hands after four passes.
We don't consider this extreme just the norm as it never gets too hot here so we try to make the best of it, quite sure @Deep11 posted a video here last year of our winter skiing.