California diesel price in December 2025
5 official EIA weekly readings
- The average California on-highway diesel price in December 2025 was $4.787 per gallon, calculated from 5 EIA weekly readings.
- The weekly low was $4.660; the weekly high was $4.919.
- That monthly average was $0.188 lower than November 2025.
- It was $0.181 higher than December 2024.
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.
December 2025 weekly chart
Every EIA week in December 2025
| Week of | $/gal | Change |
|---|---|---|
| $4.919 | ▼−$0.064 | |
| $4.862 | ▼−$0.057 | |
| $4.781 | ▼−$0.081 | |
| $4.711 | ▼−$0.070 | |
| $4.660 | ▼−$0.051 |
← November 2025 · January 2026 → · all of 2025 · all California history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.