i know this has been beaten to death, but it just looks off. pants are rumply-ish cotton (which is fine for chinos) and SC is very clean crisp wool. they are visually fighting each other.
imo, and im a bit of a bitch about this, chinos/khakis are really really hard to do with a wool SC. you need to have either a super luxe chino that essentially drapes like wool or a very deconstructed almost cotton looking wool SC for them to make sense together for me.
i understand the rain dilemma, its a real bitch. imo, the best thing to do is to either bite the bullet and get your nice pants wet and then press them, or dress down the top half along with the bottom.
my 2 cents.