 New Hampshire and Maine drivers are paying a little less of their hard-earned money when it comes time to fill up their vehicles. According to AAA, the average cost for a gallon of regular fuel in New Hampshire now $3.42. That's down one cent in the past week, but it's nine cents more than what motorists were paying one month ago. According to AAA, the average cost for a gallon of regular fuel in Maine now $3.49. That's down a penny in the past week, but it's nine cents more than what motorists were paying at this time last month. The national average currently sitting at $3.50 a gallon.