PADD 4 diesel price (Rocky Mountain) in 2026
37 official EIA weekly readings so far
- The year-to-date average PADD 4 (Rocky Mountain) on-highway diesel price in 2026 is $4.781 per gallon over 37 weekly readings.
- The weekly low was $3.185 (week of ); the high was $6.066 (week of ).
- That average was $1.205 higher than 2025.
- By average price, 2026 ranks #2 of 33 years in this regional EIA series (partial year).
This is a calendar-year view of the official EIA weekly series for Rocky Mountain. It does not estimate prices for individual states or cities. Every weekly source reading used in the annual average appears below.
2026 weekly chart
Every EIA week in 2026
| Week of | $/gal | Change |
|---|---|---|
| $3.222 | ▼−$0.011 | |
| $3.185 | ▼−$0.037 | |
| $3.246 | ▲+$0.061 | |
| $3.367 | ▲+$0.121 | |
| $3.419 | ▲+$0.052 | |
| $3.539 | ▲+$0.120 | |
| $3.607 | ▲+$0.068 | |
| $3.683 | ▲+$0.076 | |
| $3.737 | ▲+$0.054 | |
| $4.397 | ▲+$0.660 | |
| $4.796 | ▲+$0.399 | |
| $5.174 | ▲+$0.378 | |
| $5.270 | ▲+$0.096 | |
| $5.412 | ▲+$0.142 | |
| $5.256 | ▼−$0.156 | |
| $5.213 | ▼−$0.043 | |
| $5.270 | ▲+$0.057 | |
| $5.517 | ▲+$0.247 | |
| $5.491 | ▼−$0.026 | |
| $5.549 | ▲+$0.058 | |
| $5.493 | ▼−$0.056 | |
| $5.331 | ▼−$0.162 | |
| $5.200 | ▼−$0.131 | |
| $5.019 | ▼−$0.181 | |
| $4.795 | ▼−$0.224 | |
| $4.602 | ▼−$0.193 | |
| $4.484 | ▼−$0.118 | |
| $4.600 | ▲+$0.116 | |
| $4.935 | ▲+$0.335 | |
| $5.141 | ▲+$0.206 | |
| $5.285 | ▲+$0.144 | |
| $5.271 | ▼−$0.014 | |
| $5.427 | ▲+$0.156 | |
| $5.537 | ▲+$0.110 | |
| $5.555 | ▲+$0.018 | |
| $5.805 | ▲+$0.250 | |
| $6.066 | ▲+$0.261 |
← 2025 · all Rocky Mountain history · weekly CSV · monthly CSV
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EIA redesigned the survey sample and estimation methodology effective the June 13, 2022 release. Comparisons that span that date reflect both market and methodology changes.