Labor Day Prices? Paying More at the Pump in WA The average price of a gallon of gasoline in Washington is $4.02. That's 27 cents higher than the national average.
AAA Reports: Average Price of Gas in WA $3.64The AAA auto club reports the average price of a gallon of gasoline in Washington is $3.64 a gallon. Up 11 cents in a week.

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