West Coast less California diesel price in September 2025
5 official EIA weekly readings
- The average West Coast less California on-highway diesel price in September 2025 was $4.135 per gallon, calculated from 5 EIA weekly readings.
- The weekly low was $4.112; the weekly high was $4.163.
- That monthly average was $0.002 higher than August 2025.
- It was $0.302 higher than September 2024.
This is a calendar-month view of the official EIA weekly West Coast less California series. It averages only the source weeks listed below, not a separate government monthly estimate.
September 2025 weekly chart
Every EIA week in September 2025
| Week of | $/gal | Change |
|---|---|---|
| $4.112 | ▲+$0.009 | |
| $4.163 | ▲+$0.051 | |
| $4.134 | ▼−$0.029 | |
| $4.123 | ▼−$0.011 | |
| $4.143 | ▲+$0.020 |
← August 2025 · October 2025 → · all of 2025 · all West Coast less California history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.