PHOENIX (AP) -- Gasoline prices at the pump around Arizona are lower for the fifth consecutive week. Officials with Triple-A Arizona said Thursday that the average statewide price for unleaded regular gasoline is at $3.39 a gallon. That's down by more than 3 cents from last week. This week's national average is at $3.56 per gallon, up by 3 cents from the previous week. Triple-A analysts say Arizona's gas prices are about 21 cents a gallon lower heading into the Labor Day holiday weekend compared to last year. Tucson has the lowest average gasoline price in Arizona at $3.27 a gallon while Flagstaff has the highest at $3.66. South Carolina has the lowest average gas prices in the continental U.S. at $3.26 a gallon with Connecticut having the highest at $3.92 a gallon.