California diesel price in May 2026
4 official EIA weekly readings
- The average California on-highway diesel price in May 2026 was $7.271 per gallon, calculated from 4 EIA weekly readings.
- The weekly low was $7.182; the weekly high was $7.360.
- That monthly average was $0.149 lower than April 2026.
- It was $2.488 higher than May 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.
May 2026 weekly chart
Every EIA week in May 2026
| Week of | $/gal | Change |
|---|---|---|
| $7.360 | ▲+$0.132 | |
| $7.321 | ▼−$0.039 | |
| $7.222 | ▼−$0.099 | |
| $7.182 | ▼−$0.040 |
← April 2026 · June 2026 → · all of 2026 · all California history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.