The average price of gas in Massachusetts was $3.739 a gallon in the latest weekly AAA survey, the same as the previous week’s average, AAA Southern New England said Monday.

Prices locally had risen 18 cents over the past month.

The current national average for gas is $3.75 a gallon, AAA Southern New England said; a year ago at this time, the Massachusetts average price was $3.61.

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