RUTHERFORD COUNTY, TN - Average gasoline prices in Tennessee have fallen 5.0 cents per gallon in the last week, averaging $3.09/g today, according to GasBuddy's survey of 3,821 stations in Tennessee. Prices in Tennessee are 9.6 cents per gallon lower than a month ago and stand 140.2 cents per gallon lower than a year ago. LOCAL PRICES - According to GasBuddy price reports, the cheapest station in Tennessee was priced at $2.69/g yesterday while the most expensive was $3.99/g, a difference of $1 .