FuelCastWill gas prices go up next week in Arizona?
Gas prices in Arizona are likely to fall in the week to Monday, October 19. The West Coast except California regional average, which includes Arizona, is $5.071 per gallon (EIA, week of Oct 12, 2026).
Fill up just before prices jump and you pay more for the same tank. Here is where gas in Arizona stands and which way it is heading next week.
Gas prices in Arizona this week
| Fuel | Average price | Change vs last week | Next week |
|---|---|---|---|
| Regular gasoline · West Coast except California avg. | $5.071/gal week of Oct 12, 2026 | -4.5¢ | Likely to fall |
| Diesel · West Coast except California avg. | $6.503/gal week of Oct 12, 2026 | +1.3¢ | Likely to rise (weaker signal here) |
The EIA does not publish a separate weekly gasoline average for Arizona, so this page uses the West Coast except California regional average, which includes Arizona.
Weekly averages are published by the EIA, usually on Mondays. The next one is due Monday, October 19.
Know before you fill up
FuelCast shows whether prices near you are likely to rise or fall, the cheapest stations around you and the best day to fill up, with an alert when it matters.
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Questions
Will gas prices go up next week in Arizona?
Gas prices in Arizona are likely to fall in the week to Monday, October 19.
What is the average gas price in Arizona right now?
$5.071 per gallon (West Coast except California average) in the EIA weekly survey for the week of Oct 12, 2026.
When are new gas price averages published?
The U.S. Energy Information Administration publishes weekly retail averages, usually on Monday afternoons. FuelCast updates its outlook after each release.
Source: U.S. Energy Information Administration (EIA), Weekly Retail Gasoline and Diesel Prices · Public domain (U.S. Government work)