I think it helps, but only based on what I have heard about Washington. Also, I generally think about rain turning football into a run heavy game. If Penix is not affected by the rain – will be tough.
They are pass first, @USC their running was an anomaly – I don’t see how rain can help their throw game, more than grip, receivers can’t cut as hard, harder to create space.
Our run defense is excellent – and rain likely helps make them more one dimensional (or less two dimensional)
Their defense has struggled – we have run fine against bottom tier defenses