The average national gasoline price is slipping lower following Memorial Day, which has traditionally marked the start of the summer driving season and accompanying increases in fuel prices associated with it.

The pre-gallon price fell 2 cents to $2.81 for the week ending June 3, and motorists across the county are paying as much as 23 cents less than they did a month ago, as a result of lower crude oil prices, according to AAA.

"Gas prices have been trending lower now for the past month and there are no signs of pump prices changing gears toward more expensive for the summer season," said Jeanette Casselano, AAA spokesperson. "One major indicator supporting this forecast is the price of crude oil which last week dropped by $6 to $53 per barrel, which is one of the lowest prices of the year."

States with the least expensive markets now include Mississippi ($2.39), Louisiana ($2.39), Alabama ($2.41), South Carolina ($2.43), Arkansas ($2.46), Texas ($2.48), Tennessee ($2.48), Missouri ($2.53), Virginia ($2.54), and Oklahoma ($2.55).

States with the largest monthly decreases include Florida (23 cents), Delaware (16 cents), Georgia (15 cents), California (14 cents), North Carolina (14 cents), Louisiana (13 cents), Mississippi (13 cents), Texas (13 cents), Tennessee (12 cents), and South Carolina (11 cents).

Meanwhile, the average price of a gallon of diesel fell 1.5 cents to $3.136 per gallon, which is 14.9 cents lower than a year ago, according to the U.S. Energy Information Administration.