The average price for gas in Massachusetts is $3.429 a gallon in the latest weekly AAA survey, down 5 cents from the previous week’s average, AAA Southern New England said Monday.

Over the past month, the local average has fallen 16 cents, AAA Southern New England added.

The current national average is $3.24 a gallon. A year ago at this time, the Massachusetts average price was $3.21, AAA Southern New England said.

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