PADD 4 diesel price (Rocky Mountain) in August 2026
5 official EIA weekly readings
- The average PADD 4 (Rocky Mountain) on-highway diesel price in August 2026 was $5.415 per gallon, calculated from 5 EIA weekly readings.
- The weekly low was $5.271; the weekly high was $5.555.
- That monthly average was $0.625 higher than July 2026.
- It was $1.647 higher than August 2025.
This is a calendar-month view of the official EIA weekly Rocky Mountain series. It averages only the source weeks listed below, not a separate government monthly estimate.
August 2026 weekly chart
Every EIA week in August 2026
| Week of | $/gal | Change |
|---|---|---|
| $5.285 | ▲+$0.144 | |
| $5.271 | ▼−$0.014 | |
| $5.427 | ▲+$0.156 | |
| $5.537 | ▲+$0.110 | |
| $5.555 | ▲+$0.018 |
← July 2026 · September 2026 → · all of 2026 · all Rocky Mountain history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.