California diesel price in August 2026
5 official EIA weekly readings
- The average California on-highway diesel price in August 2026 was $6.875 per gallon, calculated from 5 EIA weekly readings.
- The weekly low was $6.618; the weekly high was $7.218.
- That monthly average was $0.540 higher than July 2026.
- It was $1.980 higher than August 2025.
This is a calendar-month view of the official EIA weekly California series. It averages only the source weeks listed below, not a separate government monthly estimate.
August 2026 weekly chart
Every EIA week in August 2026
| Week of | $/gal | Change |
|---|---|---|
| $6.716 | ▲+$0.046 | |
| $6.618 | ▼−$0.098 | |
| $6.785 | ▲+$0.167 | |
| $7.040 | ▲+$0.255 | |
| $7.218 | ▲+$0.178 |
← July 2026 · September 2026 → · all of 2026 · all California history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.