The Bee's weekly price check on gasoline prices across the state from AAA Gas Prices shows that the average price for regular unleaded in California on Monday, May 20, was about $4.04 per gallon, three cents lower than a week ago. While prices are slipping, they remain about cents per gallon higher than March 11. Average prices are well below their all-time highs recorded in 2008 or 2012. Click a dot to see the average price for that point in time in each of the listed markets.