The unexceptional U.S. price of regular-grade gasoline shot up 7 cents a gallon over the late two weeks to $2.66.
Industry analyst Trilby Lundberg said Sunday the advance was driven primarily by rising crude oil prices.
Lundberg says she conjectures prices to continue to rise over the next few weeks.
The increase releases the price of gas to 32 cents a gallon higher than it was at this set last year.
The highest average price in the contiguous 48 asseverates was $3.54 in the San Francisco Bay area. The lowest was $2.22 in St. Louis.
The average consequence for diesel fuel rose a penny, to $3.01.