Gasoline Prices Drift Down 9 Cents In Past Month, Still Up $1.16 Over Year

A customer pumping gasoline at an Arco gas station in Mill Valley, Calif., on March 3, 2015. Justin Sullivan/Getty Images

Gasoline prices continued their seasonal downward drift on Dec. 14, falling two and a half cents per gallon compared to a week earlier and down nine cents from a month ago, though they remain up $1.16 compared to a year ago as experts wonder if the falling trend can last amid oil price uncertainty.

The national average regular gasoline price fell to $3.323 per gallon on Dec. 14, according to the AAA, down from $3.413 a month ago but still far above the year ago average of $2.164 a gallon.