BOSTON (AP) — The price of a gallon of gasoline in Massachusetts is up another 3 cents, and has now jumped 13 cents in a month.

AAA Southern New England announced Monday that self-serve regular is selling for an average of $3.41 per gallon. That's 15 cents higher than the national average and 6 cents higher than the in-state price one year ago.

AAA found self-serve, regular selling for as low as $3.32 per gallon and as high as $3.59.