In reply to cragtyke:
I remember climbing UBS on the Penon in Calpe, years ago, when it started raining: Then, as we lodged under the small roof at the top of the rib, our nostrils were assailed with the deliciously concentrated aroma of the well rehydrated, concentrated urine stench. Luckily, the rain did not last too long, and we started climbing again after a short while (I volunteered to lead that pitch).
In reply to oscar123: You can always get out there and just imagine the ice build-up in more stable cold times.