In reply to TomAlford:
If you don't mind the freezing cold, and like short outcrop climbing, then Peak grit is generally very quick drying.
But if had some reason to do trad in the middle of winter, I'd probably head to Cornwall as the climbing is excellent, not all of it is continually getting smashed to smithereens by the Atlantic (but most of it is), and it's likely to be a bit warmer down there. I've heard that you can climb at Swanage in winter too, but given how crap it is in summer, it wouldn't be my choice.