 Increased travel demand and the onset of hurricane season. The highest gas in the state can be found in Graham County, $3.86 per gallon. The state low is in La Paz County this month or this week at $3.33. Here in Yavapai County, $3.62 is our average. And the average price for a gallon of unleaded regular gas in Prescott, $3.45 per gallon.