The GasBuddy national average gas price increased 6.3 cents over the last week to $3.08. The national average is down -1.6 cents from a month ago and is -42.5 cents per gallon lower than a year ago. The national average price of diesel has decreased 0.9 cents in the last week and stands at $3.549 per gallon. The median U.S. gas price is $2.96 per gallon, up 7 cents from last week and about -12 cents lower than the national average.