Regular gasoline averaged $5.42 a gallon in Washington in the week of October 5, 2026, −2.9¢ on the week and 107¢ above the US average. Weekly figures from the U.S. Energy Information Administration.
Washington average, week of October 5, 2026
Regular$5.42/gal−2.9¢ vs last week+$1.01 vs a year ago
Midgrade$5.75/gal−1.1¢ vs last week+99.1¢ vs a year ago
Premium$5.96/gal−3.0¢ vs last week+$1.02 vs a year ago
Diesel$6.49/gal−15.3¢ vs last week+$2.40 vs a year ago
Diesel: EIA has no Washington figure, so this is the West Coast less California average.
US average regular: $4.35 (−11.1¢ on the week). Washington is 107¢ above it.
Regular per gallon, last 52 weeks: Washington vs USWashingtonUS average
Source: U.S. Energy Information Administration (EIA), weekly retail gasoline and diesel prices, week of October 5, 2026. Prices include taxes and are averages of a survey of stations, published every Monday (Tuesday after a federal holiday); a single station near you can be well above or below them. Via the Roadscore API.
