Gas prices dropped last week in New Hampshire. The average retail price fell 2.8 cents per gallon in the past week, now averaging $3.82 per gallon. That’s 38.8 cents per gallon higher than the same day one year ago and 8.4 cents per gallon lower than a month ago.. Maine saw a larger price drop this past week, falling 5 cents per gallon, and now averaging $3.88 per gallon. That’s 34.8 cents per gallon higher than the same day one year ago and 13.7 cents per gallon lower than a month ago. Prices seem to be pretty much in line with the national average which fell 2.8 cents per gallon in the last week, now stands at $3.77 per gallon.