PORTLAND, Maine — Gas prices have stayed about the same in all three northern New England states over the past week.

A GasBuddy survey of more than 1,200 stations in Maine found that gas prices were 4.2 cents per gallon lower than a month ago, but unchanged from last week. The average price is $2.79 per gallon, which is still nearly a dollar more than the price a year ago.

GasBuddy said prices in Vermont and New Hampshire were both down less than half a penny per gallon from last week. Vermont prices fell to $2.76 per gallon while New Hampshire’s fell to $2.69 per gallon.

The nationwide average also stayed about the same at $2.85 per gallon.