Ah I see, well I'm glad I clarified then because I was misunderstanding you and would have answered with irrelevant information. But to answer then, no I haven't, so sorry I couldn't help. I tried!
But I would just head on down to the island and try out some blood curse arrows. Go in first person, draw your bow, and aim. Just slowly move around the sky where it seems the sun is around, if you pay close attention, the game kind of lets you know when you're aiming at the sun correctly, no matter the weather. It does some effect thing with the screen a little, and the screen turns a different shade kind of. This works for me in Winterhold (and the weather there is complete plops with snow and cloudiness). I figured I try to offer some info at least
But everytime I've done this, the screen does that and lets me know, so the weather is of no effect thankfully, because that would be a bitch to aim.