The national average price of gasoline in the US fell -8.2 cents to $3.13 over the last week. This is up 7.8 cents from a month ago and down -46.9 cents from a year ago. The national average price of diesel has decreased -4.8 cents in the last week and stands at $3.546 per gallon. The median US gas price is $2.99 per gallon, down -10 cents from last week and about -14 cents lower than the national average.