It really depends on what you consider bad weather. I've lived in some pretty nasty winter places, some with shorter days than even London (although I am not sure about Scotland, may have been comparable) and another place where it seems God/Mother Nature/The big friggen lakes seem to be trying to repeatedly kill the residents with massive snowfalls in short periods and at times, I would prefer any of that to the damp, drafty, overcast winters. Most of the time it's not bad, and the rain, as others have said, is usually drizzly or misty, at least around here.
That said, the springs, just like the springs in Scandinavia, are glorious. I don't mind early and late summer, but the whole not getting dark until 10 pm bugs me after a while, and always has. It's also nice to have warmish summers which aren't so hot that you feel the need to go and buy an air conditioner. I've never owned one, but every single summer in the States I felt tempted to buy one. Frankly, I will take the overcast damp to stiffling humid really.