MOSES LAKE — Average gasoline prices continue to decline across Washington state and the nation, with prices down from both last week and a month ago, according to AAA data, though they remain significantly higher than this time last year. 

As of June 22, Grant County drivers are paying an average of $5.09 per gallon. That’s down 18 cents from $5.27 last week and 49 cents less than the $5.58 reported May 26. Still, prices are 67 cents higher than a year ago, when the average stood at $4.42. 

Adams County saw a smaller weekly decline, with prices averaging $5.16 per gallon, down just 3 cents from $5.19 last week and 33 cents from $5.49 a month ago. Compared to June 2025, when prices averaged $4.34, that’s an increase of 82 cents. 

The average price for a gallon of regular gasoline in Washington is $5.35, down 16 cents from $5.51 a week ago and 41 cents lower than $5.76 on May 26. However, prices are still 91 cents higher than June 23, 2025, when the statewide average was $4.44. 

Washington remains the third most expensive state to purchase fuel with only California at $5.58 and Hawaii at $5.53 with higher prices in the nation.  

Nationally, the average price sits at $3.93 per gallon, a decrease of 14 cents from last week’s $4.07 and 56 cents lower than $4.49 a month ago. Compared to a year ago, when the national average was $3.22, prices are up 71 cents. 

“Average gasoline prices declined in nearly every state over the last week, while all 50 states saw average diesel prices move lower,” said Patrick De Haan, head of petroleum analysis at GasBuddy. “However, the outlook is far from settled. New uncertainty has emerged after Iran suggested the Strait of Hormuz was closed, along with fresh warnings that the U.S. could again strike Iran, developments that could push oil prices higher in the days ahead. Despite this, gasoline prices aren’t yet at significant risk of a spike, as some vessels have continued to move through the Strait. Still, should the situation worsen or escalate further, motorists could see that risk change quickly.” 

Despite recent relief at the pump, prices remain elevated compared to last year, and global tensions could quickly reverse the downward trend, De Haan said.