North Dakota's average gas price was slightly below the national average of $2.41 per gallon as of Monday.
The increase in gas costs now marks the highest seen since the second week in January, the organization said.
The national average is at its highest price this year and has now increased for 20 consecutive days.
17 in terms of having the least expensive gas, with prices dropping 5 cents to $2.31 per gallon.
The region made its final switch to summer-blend gasoline last week, which caused states in the area to top the list of largest weekly increases: DE (9 cents), Vermont (6 cents), Maryland (6 cents), North Carolina (5 cents), Rhode Island (5 cents), ME (5 cents) and Pennsylvania (5 cents).
The website says Pennsylvania is the highest at 78 cents per gallon and Alaska the lowest at 31 cents per gallon.
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No state showed an average of below $2.00 a gallon Monday morning. Compared to this same time previous year, Pennsylvania is seeing significant increases at the pump.
Including the change in gas prices in Alabama during the past week, prices yesterday were 27.0 cents per gallon higher than the same day one year ago and are 13.1 cents per gallon higher than a month ago. The price for a barrel of crude averaged $53.19 last week - an increase of $1.92 from the week before.
In Rhode Island, regular is up 6 cents, to $2.36, AAA said.
The region's pumps are on average 40 cents more expensive than this time one year ago; 7 cents more expensive than in 2015; and $1.04 cheaper than in 2014. The national average, now $2.41, has increased for 20 straight days, AAA Tidewater says. That's nearly 30 cents higher than one year ago at this time.
Find the most up-to-date local gas prices with the AAA Fuel Finder by logging onto AAA.com and clicking on Gas Saving Tips & Tools.