IRVING, Texas—Retail gasoline prices continue to rise in Texas, increasing by 2 cents over the last week.

Prices increased across the state by an average of 8 cents the prior week.

AAA Texas on Thursday reported the average price per gallon of regular unleaded has reached $3.36. The price is 18 cents less than this time a year ago.

The national average is $3.54.

AAA says drivers in Fort Worth are paying the most in the state at $3.47 per gallon while motorists in San Antonio are paying the least at $3.25.

Analysts expect prices to peak in the coming weeks, but any change depends on seasonal refinery maintenance and disruptions to production or distribution.

It costs a driver in Texas about $47 to fill a standard 14-gallon fuel tank.