Average gasoline prices in South Dakota have risen 9.3 cents per gallon in the last week, averaging $2.90/g today, according to GasBuddy’s survey of 628 stations in South Dakota. Prices in South Dakota are 12.0 cents per gallon higher than a month ago and stand 14.6 cents per gallon higher than a year ago. The national average price of diesel has decreased 2.4 cents in the last week and stands at $3.626 per gallon…