 Headed toward the busy July 4th holiday Thursday, the average price for a gallon of regular gas in New Hampshire, now $3.37. Some stations are higher, some are lower, but that's the average, $3.37 in New Hampshire. 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 a gallon.