This was supposed to be Campanula raineri, but it clearly isn't. Looks to me like a geranium, though I haven't quite ruled out a weedy ranunculus, perhaps? Any thoughts?
I would say a Geranium. However, which one isn't easy to tell.
Rogaland, Norway - with cool, often rainy summers (29C max) and mild, often rainy winters (180 cm/year)!