 Headed toward the busy 4th of July holiday Thursday, the average price for a gallon of regular gas in New Hampshire, $3.37. Some stations are higher, some are lower, but that is the average in New Hampshire, $3.37. That's up 3 cents from last week, according to AAA. In Maine, according to AAA, the average cost for a gallon of regular fuel, now $3.44. That's up 4 cents in the past week, but it's 7 cents less than what motorists were paying at this point one month ago. The current national average is $3.49 per gallon.