MONTEREY COUNTY, Calif. (KION-TV)- California's gas tax is set to go up starting tomorrow. According to AAA, the average national gas price as of Wednesday is $4.85, while California's average gas price stands at $6.28. He fills up gas twice a week. "Putting gas twice in twice a week, you'll probably see three or four cents more than someone who commutes in town." "Still, anything that pushes gas prices up anymore at this point is not going to be something that people want to hear right now."