Hear-hear on "there's more to life than money", but would still argue many of the things you list ("weather, local arts, music, culture") can be quantified to far larger extent than most bother.
Here's one attempt, as an appropriate illustration for the Bay Area: https://teleport.org/cities/san-francisco-bay-area/
(skip the top for startups, worst for housing and unfold the leisure, culture and tolerance categories, for example).
Median LA developer salaries on full time basis (https://teleport.org/cities/los-angeles/salaries/) seem to be 66k for web developer (for the lack of FE in taxonomy) and 78.7k for software engineers in general.
Without knowing your personal tax situation it is hard to deduct your net hourly income from this - so probably more useful to discuss and compare gross (pre-personal-tax) billing rates when trying to understand the market?
This question has come up so often in last few weeks that we gathered some reading and tooling to help pragmatic post-Brexit decision making, here: https://teleport.org/brexit
* https://www.expatistan.com/cost-of-living/san-francisco
* https://teleport.org/cities/san-francisco-bay-area/
* https://nomadlist.com/san-francisco-ca-united-states/scores