Prices in Houston went up a nickel overnight to $3.71.
The average U.S. price per gallon has jumped 12 cents over the past two weeks. That's according to the latest Lundberg Survey of fuel prices, which puts the price of a gallon of regular at $3.81.
Midgrade costs an average of $3.96 a gallon, and premium is at $4.07.
Of the cities surveyed, Denver has the nation's lowest price $3.36. Los Angeles has the highest at $4.35.
The Associated Press contributed to this report.