Average gas prices in North Carolina have fallen 2.5 cents per gallon in the last week, now averaging $3.31/g, according to GasBuddy’s survey of 6,092 stations in North Carolina. Prices in the state are 6 cents per gallon higher than a month ago and 13.44 cents per gallon lower than a year ago. The national average price of diesel has fallen 1.6 cents in the last week and stands at $3.87 per gallon.