Pump prices · week of September 21, 2026
Diesel and regular gasoline prices in California
In the week of September 21, 2026, diesel averaged $8.25 a gallon in California and regular gasoline $6.00 (US$2.18 a litre for diesel). Diesel is +67% and regular gasoline +35% compared with the week of February 23, 2026, before the Strait of Hormuz closed.
Updated September 21, 2026 · Source: US EIA weekly retail gasoline and diesel prices
| This week | Week ago | Week of February 23, 2026 | Change since then | |
|---|---|---|---|---|
| Regular gasoline ($/gal) | 6.003 | 5.827 | 4.441 | +35.2% |
| Diesel ($/gal) | 8.246 | 8.039 | 4.944 | +66.8% |
Trend
■ Diesel ■ regular gasoline, weekly, in $/gal.
Common questions
How much is diesel in California?
$8.25 a gallon on average in the week of September 21, 2026 (US$2.18 a litre), according to the US EIA weekly retail gasoline and diesel prices.
How much has fuel risen in California since February 2026?
Diesel: +67%. Regular gasoline: +35%. Compared with the week of February 23, 2026.
How does California compare with the US average?
Diesel in California is $8.25 against $6.53 for the United States.
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