Pump prices are down from last week, according to an Energy Information Administration report (link opens a PDF) released today.

Retail regular gasoline prices clocked in at a national average of $3.239 per gallon for Dec. 16, $0.03 below last week's price tag. Gulf Coast prices dropped the most ($0.057), while West Coast prices barely budged, down half a penny.

Compared with a year ago, pump prices are down $0.015. 

Source: EIA.gov. 

For the same period, average retail diesel prices dipped $0.008 for a national average of $3.871 per gallon. On a regional basis, Midwest prices made the deepest $0.018 dip, while East Coast prices added on $0.003 to per gallon prices.

Over the past year, diesel prices have decreased $0.074. 

Source: EIA.gov 

At these latest prices, the West Coast pays the prettiest penny for both gasoline ($3.472) and diesel ($3.982). On the other end, the Gulf Coast can guzzle gas for just $3.047 and diesel for $3.766 per gallon.

You can follow Justin Loiseau on Twitter, @TMFJLo, and on Motley Fool CAPS, @TMFJLo.

Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.