Gas prices remain stable AAA's monthly fuel gauge survey shows the statewide average price of gasoline in South Dakota has remained virtually stable over the past month. Today's average is at $1.152 per gallon for regular unleaded gasoline, while last month the average was $1.158.
The monthly survey also shows the current Sioux Falls average is about $1.082 per gallon, down about 2.6 cents from last month, while the Rapid City average has risen approximately 1.2 cents over the past month to $1.187 per gall9on.
Nationwide, the average price of gasoline is $1.12 � down 1.2 cents from last month. When comparing prices to one year ago, the national average today is approximately 37 cents lower and the South Dakota statewide average is 40.9 cents lower.