Meant to share this earlier in a discussion about weather apps, but forgot. This site is interesting because it scores different weather apps based on their previous accuracy in your area. Most of the best ones, unfortunately, at least in my experience, are probably going to be proprietary. I would always grumble to Mrs. Hedge that the weather apps were always wrong, and it turned out that the one I was using had something like a 50% success rate for my area! So no wonder.
Is there something similar for Europe?