Average retail gasoline prices in Tennessee have risen 2.3 cents per gallon in the past week, averaging $3.66/g yesterday. This compares with the national average that has increased 2.3 cents per gallon in the last week to $3.86/g, according to gasoline price website TennesseeGasPrices.com. All prices are based on 87 octane. Including the change in gas prices in Tennessee during the past week, prices yesterday were 27.6 cents per gallon higher than the same day one year ago and are 17.4 cents per gallon higher than a month ago. The national average has increased 15.8 cents per gallon during the last month and stands 24.9 cents per gallon higher than this day one year ago. The low price in Manchester is $3.62 with a high of $3.84. Tullahoma has a low price of $3.55 and a high of $3.65.