The average price for gas in Massachusetts was $3.45 a gallon in the latest weekly AAA survey, down 3 cents from the previous week’s average price, AAA Southern New England said Monday.

Massachusetts prices are down a nickel over the past month, AAA Southern New England added.

The current national average is $3.48 a gallon. A year ago at this time, the Massachusetts average price was 9 cents lower at $3.36.

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In the latest Massachusetts survey, the range in prices was 38 cents, from a low of $3.31 to a high of $3.69.

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