That's a pretty big generalization. SoCal is a big place, and Hawaii is an island chain with varied climates. I've lived about half my life in CA and about half in Hawaii (and visit there often; 5x this year so far), and I will certainly argue the weather where I am at in CA is much better than the weather where I grew up in HI. Most areas in HI are noticeably more humid, and hotter. I sweat just walking around outside, and usually if I'm there I'm working hard, taking care of some car or home maintenance item. Just dripping sweat. I barely break a sweat working all day in the yard here, where there's maybe 10 days a year where it's above 80, and rarely gets below 40...hard to beat. Much of Hawaii regularly sees >90*F in the summer, and again, with that wilting humidity. Sure, if I'm going to go to the beach, I would much rather it be in HI.