Massachusetts gas prices drop a penny a gallon

The average price for gas in Massachusetts is $3.659 a gallon in the latest weekly AAA survey, down 1 cent from the previous week’s average, AAA Southern New England said Monday.

The Massachusetts average is down 23 cents over the past month.

The current national average for gas is $3.47 a gallon. A year ago at this time, the Massachusetts average was $3.39.

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AAA’s weekly surveys focus on self-serve, regular unleaded gas.