Rutherford County, TN - Average gasoline prices in Tennessee have fallen 7.6 cents per gallon in the last week, averaging $3.30/g today, according to GasBuddy's survey of 3,821 stations in Tennessee. Prices in Tennessee are 16.5 cents per gallon higher than a month ago and stand 52.2 cents per gallon lower than a year ago. The national average price of diesel has fallen 3.0 cents in the last week and stands at $4.12 per gallon. In Rutherford County on Monday, gas prices proved to be the lowes ...