That weather was like a typical Midwest winter day, with a bit more rain than usual. Perfect setup for Desi. Just another training run for us Midwesterners. Ho hum. Not sure if that is something you coasties understand.
Yuki won because his accummulated marathon experience in every condition imaginable prepared him for this moment. He just ran it like a human metronome, as he always does, while everyone else was lost in the woods. He knew what he had to do, more than anyone else out there. He has now secured his legendary status.