For the third straight week, gasoline prices in Massachusetts have had a double-digit drop, and prices in the Bay State are now a dollar per gallon lower than one year ago, according to AAA Southern New England.

AAA’s December 29th survey of prices in Massachusetts found self-serve, regular unleaded averaging $2.46 per gallon, down 11 cents from last week. Prices locally are 39 cents lower than a month ago. The current price is 17 cents more than the national average for self serve unleaded of $2.29. A year ago at this time the Massachusetts average price was one dollar higher at $3.46. Prices were last this low in October of 2009.

The range in prices in the latest AAA survey for unleaded regular is 66 cents, from a low of $2.23 to a high of $2.89. AAA advises motorists to shop around for the best prices in their area, and to make sure they and their passengers buckle up ‘ every trip, every time.

Today’s local gas prices and their ranges are as follows:

Self Serve Grade

$2.469 ($2.239-$2.899) Regular Unleaded

$2.739 ($2.309-$3.299) Midgrade Unleaded

$2.889 ($2.499-$3.499) Premium Unleaded

$3.209 ($2.999-$3.699) Diesel

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. AAA members can also obtain a copy of the Gas Watcher’s Guide at their local AAA Southern New England office.