The average national gasoline price increased at least 3 cents in 39 states to reach $2.28, which is also 3 cents higher than it was a week ago, according to AAA.

The increase is the highest over a seven-day periord since before Memorial Day.

"Demand has remained strong as gasoline stocks dip for a fifth consecutive week, driving up prices at the pump," said Jeanette Casselano, AAA's spokesperson. "For much of the summer, gas prices have been fairly cheap. Those days are in the rearview mirror."

Gasoline supply dipped 4.4 million barrels to 231 barrels, which is 10 million barrels lower than supply levels from a year ago, according to the U.S. Energy Information Administration.

States with the largest weekly increases include Indiana (8 cents), Florida (7 cents), Ohio (7 cents), Michigan (6 cents), Delaware (6 cents), New Jersey (6 cents), Texas (5 cents), Pennsylvania (5 cents), Virginia (5 cents), and Kentucky (4 cents).

States with the cheapest gasoline include South Carolina ($1.99), Alabama ($2.00), Mississippi ($2.01), Oklahoma ($2.04), Arkansas ($2.04), Tennessee ($2.05), Virginia ($2.07), Missouri ($2.07), Louisiana ($2.08) and Texas ($2.09).

Meanwhile, the average price of diesel increased 1.6 cents to $2.507, which is 12.8 cents higher than it was a year ago, the EIA reported.