The average price for gas in Massachusetts is $3.669 a gallon in the latest weekly survey from AAA, down 10 cents from the previous week’s average, AAA Southern New England said Monday.

Local prices have fallen 18 cents a gallon over the past month, AAA Southern New England added.

The current national average price is $3.54 a gallon. A year ago at this time, the Massachusetts average price was $3.40.

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