I was clearly weaker than normally, but we didn't race so I was ok. And even the rain didn't bother me.
We did shortened the hike a bit, but the reason was the weather, no how I felt. Rather that climbing two additional mountains - 200m up and down, up and down again, one of the slopes being notoriously muddy (the sort of sliding kind of mud, as opposed to the sticky one). I found quite a convenient path leading right to the valley.