https://www.siliconvalley.com/2023/06/21/california-is-no-longer-americas-most-expensive-state-for-gas/ > New York  — Drivers in the state of Washington are celebrating the official start of summer with an unwelcome sight: America’s most expensive gas prices. > The average cost of regular gasoline in Washington state has jumped by 32 cents over the past month to $4.93 a gallon, according to AAA. That’s 7 cents ahead of California, which is notorious for its high prices for everything, especially fuel.