Edward
Well, I definitely don't want to stay in London once you're back. I'm not really familiar with which cities seem to stay the most overcast but now that most of your family is here, I guess you'll want to be near them? Then again, with portkeys, we can live anywhere we want and you'll still be able to see anyone you want anytime you want. Not to mention, you run pretty fast... ;)
I did Google search "cities with the most rainfall" and came up with a top ten list: