1/10 AAA Arizona says the national average for a gallon of gas is up 2-cents from last week with the average price in the state at $3.06-per gallon. Yuma has the lowest gas price at $2.96 while Scottsdale has the highest price at $3.17. The national average per kilowatt hour of electricity at a public EV charging station remained at 34-cents. The price has not changed in the past 5-weeks.