Massachusetts gas prices fall by a penny, remain slightly above the national average

The price of a gallon of gasoline in Massachusetts has dipped another penny to an average of $3.38.

AAA Southern New England reports Monday that self-serve, regular is now 6 cents per gallon lower than a month ago and 9 cents lower than a year ago.

The in-state price, however, remains 4 cents higher than the national per-gallon average.

AAA found self-serve, regular for as low as $3.21 and as high as $3.69 per gallon.