It is around $3.68 here. But where I am originally from (Sweden) their prices per liter is $2.25. So for a gallon (which is 3.79 litre) is $8.53.
I would say that it is due to someone here in US (not naming names) saying that we would not drill for oil and supply our country with own drilled energy sources. We are currently dependant on other countries to supply us the gas.
I am off my soap box now