CHARLESTON, S.C. (WCSC) – Gas prices in South Carolina and in the nation have both taken a slight dip heading into the last week of 2024. In the Palmetto State, gas prices have fallen by about 2.1 cents per gallon, leaving South Carolinians with an average price of $2.70 per gallon Monday morning, according to GasBuddy’s survey of over 3,000 stations in the state.