Average retail gasoline prices in Atlanta have fallen 4.9 cents per gallon in the past week, averaging $3.37/gal yesterday. This compares with the national average that has fallen 4.5 cents per gallon in the last week to $3.61/gal, according to gasoline price website AtlantaGasPrices.com. Including the change in gas prices in Atlanta during the past week, prices yesterday were 28.1 cents per gallon lower than the same day one year ago and are 26.7 cents per gallon lower than a month ago.