As the Memorial Day Weekend gets underway, AAA says motorists will see the highest gas prices since 2014. The current national average price for a gallon of unleaded gasoline is $3.04 per gallon, 16 cents more than a month ago and $1.08 per gallon higher than last year. The average price per gallon of unleaded in Missouri is $2.72. In Adair County it’s $2.75.