Gas in Washington averaged $4.75 in 2026 — $4.62 in today’s money
Average, that year
$4.75
In 2025 dollars
$4.62
The average price of a gallon of regular gasoline in Washington across 2026, shown both as it was at the pump and adjusted for inflation to constant 2025 dollars (CPI-U). Figures for 2026 are year-to-date (24 weeks so far).
Across the year
How Washington prices moved through 2026
Weekly average for regular gasoline. The year’s high was $5.59 the week of May 11, 2026; the low was $3.65 the week of January 12, 2026 — a swing of 53.5%.
View the weekly data (24 weeks)
| Week of | Nominal | 2025 $ |
|---|---|---|
| January 5, 2026 | $3.71 | $3.66 |
| January 12, 2026 | $3.65 | $3.59 |
| January 19, 2026 | $3.66 | $3.61 |
| January 26, 2026 | $3.69 | $3.63 |
| February 2, 2026 | $3.76 | $3.70 |
| February 9, 2026 | $3.86 | $3.80 |
| February 16, 2026 | $4.01 | $3.94 |
| February 23, 2026 | $4.14 | $4.07 |
| March 2, 2026 | $4.20 | $4.10 |
| March 9, 2026 | $4.52 | $4.41 |
| March 16, 2026 | $4.79 | $4.67 |
| March 23, 2026 | $5.16 | $5.03 |
| March 30, 2026 | $5.19 | $5.06 |
| April 6, 2026 | $5.23 | $5.07 |
| April 13, 2026 | $5.21 | $5.05 |
| April 20, 2026 | $5.22 | $5.06 |
| April 27, 2026 | $5.30 | $5.13 |
| May 4, 2026 | $5.53 | $5.33 |
| May 11, 2026 | $5.59 | $5.39 |
| May 18, 2026 | $5.59 | $5.39 |
| May 25, 2026 | $5.57 | $5.37 |
| June 1, 2026 | $5.52 | $5.33 |
| June 8, 2026 | $5.44 | $5.25 |
| June 15, 2026 | $5.34 | $5.15 |
Year over year
How 2026 compares, adjusted for inflation
vs. prior year · 2025
+12.1%
2025 averaged $4.12 in 2025 dollars.
vs. following year
No later year on record.
2026 was Washington’s 8th-most-expensive year for gas on record, adjusted for inflation — equivalently, the 17th-cheapest of 24 years (2003–2026).
Every grade
Washington fuel prices by grade in 2026
Year-average price per grade. Premium figures are the spread drivers paid for higher-octane fuel that year.
| Grade | Avg / gal | 2025 $ | vs. regular |
|---|---|---|---|
| Regular | $4.75 | $4.62 | — |
| Midgrade | $5.09 | $4.95 | +34.5¢ |
| Premium | $5.28 | $5.14 | +53.5¢ |
Common questions
Washington gas prices in 2026, answered
- What was the average price of gas in Washington in 2026?
- The average price of regular gasoline in Washington in 2026 was $4.75 per gallon — about $4.62 in 2025 dollars after adjusting for inflation, according to U.S. Energy Information Administration weekly data.
- How high did gas prices get in Washington during 2026?
- Washington's weekly average for regular gasoline peaked at $5.59 the week of May 11, 2026 and bottomed out at $3.65 the week of January 12, 2026 — a swing of 53.5% across the year.
- Were gas prices in Washington higher in 2026 than in 2025?
- Adjusted for inflation, regular gasoline in Washington was more expensive in 2026 than in 2025, up 12.1% year over year.
- How does 2026 rank for gas prices in Washington history?
- Adjusted for inflation, 2026 was the 8th-most-expensive year for regular gasoline in Washington out of the 24 years EIA has published weekly prices (2003–2026).