I wonder about pokemon that can take advantage of BOTH weather types utilized. I'm thinking here of Sand Force Gastrodon (yes, I'm aware that it's typically the Storm Drain edition that's recommended). In rain, water moves get boosted; in sand, ground moves get boosted...either way, SF Gastrodon gets a STAB move boosted beyond the usual. (Now to do something about its sub-par speed, especially if a grass attack is lurking nearby...)
Should be quite a challenge to find something that specifically gets bonuses (beyond not getting scoured) from, say, hail and sun, though...