Gas in Washington averaged $3.45 in 2021 — $4.09 in today’s money
Average, that year
$3.45
In 2025 dollars
$4.09
The average price of a gallon of regular gasoline in Washington across 2021, shown both as it was at the pump and adjusted for inflation to constant 2025 dollars (CPI-U).
Across the year
How Washington prices moved through 2021
Weekly average for regular gasoline. The year’s high was $3.81 the week of August 23, 2021; the low was $2.60 the week of January 11, 2021 — a swing of 46.3%.
View the weekly data (52 weeks)
| Week of | Nominal | 2025 $ |
|---|---|---|
| January 4, 2021 | $2.60 | $3.19 |
| January 11, 2021 | $2.60 | $3.19 |
| January 18, 2021 | $2.63 | $3.23 |
| January 25, 2021 | $2.65 | $3.25 |
| February 1, 2021 | $2.67 | $3.26 |
| February 8, 2021 | $2.73 | $3.34 |
| February 15, 2021 | $2.78 | $3.39 |
| February 22, 2021 | $2.84 | $3.47 |
| March 1, 2021 | $2.97 | $3.61 |
| March 8, 2021 | $3.06 | $3.71 |
| March 15, 2021 | $3.13 | $3.80 |
| March 22, 2021 | $3.21 | $3.91 |
| March 29, 2021 | $3.22 | $3.92 |
| April 5, 2021 | $3.23 | $3.90 |
| April 12, 2021 | $3.23 | $3.90 |
| April 19, 2021 | $3.24 | $3.92 |
| April 26, 2021 | $3.27 | $3.95 |
| May 3, 2021 | $3.35 | $4.02 |
| May 10, 2021 | $3.37 | $4.04 |
| May 17, 2021 | $3.41 | $4.09 |
| May 24, 2021 | $3.44 | $4.12 |
| May 31, 2021 | $3.44 | $4.13 |
| June 7, 2021 | $3.49 | $4.15 |
| June 14, 2021 | $3.49 | $4.16 |
| June 21, 2021 | $3.52 | $4.19 |
| June 28, 2021 | $3.60 | $4.29 |
| July 5, 2021 | $3.68 | $4.36 |
| July 12, 2021 | $3.73 | $4.42 |
| July 19, 2021 | $3.73 | $4.41 |
| July 26, 2021 | $3.75 | $4.44 |
| August 2, 2021 | $3.75 | $4.43 |
| August 9, 2021 | $3.78 | $4.47 |
| August 16, 2021 | $3.80 | $4.49 |
| August 23, 2021 | $3.81 | $4.49 |
| August 30, 2021 | $3.80 | $4.49 |
| September 6, 2021 | $3.80 | $4.46 |
| September 13, 2021 | $3.79 | $4.46 |
| September 20, 2021 | $3.78 | $4.44 |
| September 27, 2021 | $3.76 | $4.42 |
| October 4, 2021 | $3.75 | $4.37 |
| October 11, 2021 | $3.76 | $4.38 |
| October 18, 2021 | $3.77 | $4.39 |
| October 25, 2021 | $3.81 | $4.43 |
| November 1, 2021 | $3.79 | $4.37 |
| November 8, 2021 | $3.78 | $4.37 |
| November 15, 2021 | $3.78 | $4.36 |
| November 22, 2021 | $3.78 | $4.36 |
| November 29, 2021 | $3.78 | $4.36 |
| December 6, 2021 | $3.77 | $4.32 |
| December 13, 2021 | $3.75 | $4.30 |
| December 20, 2021 | $3.75 | $4.30 |
| December 27, 2021 | $3.73 | $4.28 |
Year over year
How 2021 compares, adjusted for inflation
2021 was Washington’s 15th-most-expensive year for gas on record, adjusted for inflation — equivalently, the 10th-cheapest of 24 years (2003–2026).
Every grade
Washington fuel prices by grade in 2021
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 | $3.45 | $4.09 | — |
| Midgrade | $3.71 | $4.40 | +26.0¢ |
| Premium | $3.85 | $4.57 | +40.3¢ |
Common questions
Washington gas prices in 2021, answered
- What was the average price of gas in Washington in 2021?
- The average price of regular gasoline in Washington in 2021 was $3.45 per gallon — about $4.09 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 2021?
- Washington's weekly average for regular gasoline peaked at $3.81 the week of August 23, 2021 and bottomed out at $2.60 the week of January 11, 2021 — a swing of 46.3% across the year.
- Were gas prices in Washington higher in 2021 than in 2020?
- Adjusted for inflation, regular gasoline in Washington was more expensive in 2021 than in 2020, up 23.8% year over year.
- How does 2021 rank for gas prices in Washington history?
- Adjusted for inflation, 2021 was the 15th-most-expensive year for regular gasoline in Washington out of the 24 years EIA has published weekly prices (2003–2026).