PADD 4 diesel price (Rocky Mountain) in May 2026
4 official EIA weekly readings
- The average PADD 4 (Rocky Mountain) on-highway diesel price in May 2026 was $5.513 per gallon, calculated from 4 EIA weekly readings.
- The weekly low was $5.491; the weekly high was $5.549.
- That monthly average was $0.225 higher than April 2026.
- It was $2.043 higher than May 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.
May 2026 weekly chart
Every EIA week in May 2026
| Week of | $/gal | Change |
|---|---|---|
| $5.517 | ▲+$0.247 | |
| $5.491 | ▼−$0.026 | |
| $5.549 | ▲+$0.058 | |
| $5.493 | ▼−$0.056 |
← April 2026 · June 2026 → · all of 2026 · all Rocky Mountain history · monthly CSV
Download the underlying weekly EIA series or see the methodology and source cross-check.