Quasi "outages" in California refinery crackers are bucking the price decreases of gasoline in California. In 30 states, gasoline is under $2/gal but in California, it is north of $2.50, and it isn't even the expensive summer blend.
California's fuel prices will always be higher than other states because their blend is stricter than most of the rest of the nation and far fewer refineries are built to produce that blend.
Last Christmas prices dropped significantly. There were $2.25 to $2.50/gal in California, but almost $1.20/gal in Arizona and New Mexico.
California has another $0.30-$0.50/gal in taxes that other states don't have. The price will always be higher.