I didn't realize that temperate rainforest go all the way down to the NW of California. Coming from Seattle, WA that's pretty cool. (the more you know). :-)
I've half-joked in the past that the Pacific Northwest starts on the north side of the Golden Gate Bridge. It really is true that by the time you're a couple hours north on the coast, though, it's a pretty profound difference: foggier, rainier, cooler but moderate (i.e., lower highs but higher lows).