In reply to mattking_109:
It's fairly safe to say that you can always find something to climb at Shepherds whatever the weather conditions. I have -- though climbing Brown Crag Wall in big boots in full monsoon conditions was not the most pleasant experience I've had there!
I'd possibly draw the line at going there if the place was plastered in hoar frost or verglas -- but then again most of the Borrowdale winter routes would be in nick so why bother with Shepherds!