Good or bad climate is pretty subjective, so it depends on what you prefer, I guess. From Wikipedia (measurements from the airport), the whole 'it always rains' seems like an exaggeration - ~960 mm a year, less than other major US cities that are not known for being rainy. Mild winters, decently warm (and not hot) summers considering it's proximity to the Pacific, and its latitude. BC, Canada seems - from what I've read, not experienced - pretty mild for its latitude, and Vancouver is the warmest city in Canada#, despite being above the 49th parallel.

Seattle climate seems nice if you prefer/can tolerate relatively much precipitation (though perhaps not relatively much for being in the Pacific Northwest), mild winters (lows not below freezing, on average), and decently warm summers.

EDIT: and apparently not many sunny days, annually. Overcast weather seems to be more of a problem in Seattle than rainy weather.

# Or perhaps just the warmest major city; Victoria, BC seems warmer. As an aside, certain places in the mid interior BC looks to be one of the warmest places in Canada, maybe even warmer than Southern Ontario. The Pacific Northwest has a pretty mild climate for its latitude(s), overall.