California diesel price in January 2026
4 official EIA weekly readings
- The average California on-highway diesel price in January 2026 was $4.656 per gallon, calculated from 4 EIA weekly readings.
- The weekly low was $4.613; the weekly high was $4.712.
- That monthly average was $0.131 lower than December 2025.
- It was $0.078 lower than January 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.
January 2026 weekly chart
Every EIA week in January 2026
| Week of | $/gal | Change |
|---|---|---|
| $4.641 | ▼−$0.019 | |
| $4.613 | ▼−$0.028 | |
| $4.658 | ▲+$0.045 | |
| $4.712 | ▲+$0.054 |
← December 2025 · February 2026 → · all of 2026 · all California history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.