The most granola UC is UC Santa Cruz, and it is pretty darn granola! But maybe not worth OOS cost. The most granola CSU is Humboldt, and it also very granola, but the weather is similar to Oregon. But all that rain and fog is what makes those redwoods and ferns so gorgeous. Humboldt is part of WUE and I know many people who loved their time there, including my husband.
When people describe Oregon and Washington as “cold,” I think what they mean is that it’s rarely warm, even in summer.
Edited to add that UCSC is on the quarter system, while Cal Poly Humboldt is not.