The ocean makes weather a little wonky. Well, the Puget Sound, but its connected, and big. Really big. Any big body of water acts as a dampener on temp swings. More continental regions get HUGE temp swings. Fairbanks, Alaska is almost right at the center of the most massive state in the US, and experiences temperature ranges from -60 to 115 F on a yearly basis. Hard to believe.
Really, it seldom gets below freezing here in Seattle. You need cold temperatures for snow to stick. It'll snow sometimes, but it seldom lasts more than a day. About once every other year or so we get SNOWMAGEDDON, which lasts a week, but that is rare and 1/52 weeks doesn't really count.
Geography > lattitude