California diesel price in October 2026
3 official EIA weekly readings available so far
- The average California on-highway diesel price in October 2026 was $8.138 per gallon, calculated from 3 EIA weekly readings available so far.
- The weekly low was $8.082; the weekly high was $8.242.
- That monthly average was $0.081 higher than September 2026.
- It was $3.202 higher than October 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.
October 2026 weekly chart
Every EIA week in October 2026
| Week of | $/gal | Change |
|---|---|---|
| $8.082 | ▼−$0.099 | |
| $8.091 | ▲+$0.009 | |
| $8.242 | ▲+$0.151 |
← September 2026 · all of 2026 · all California history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.