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Iowa Diesel Hits Record High as Gasoline Prices Surge

By Markets Desk · 2026-09-18 · 1 min read
A fuel pump nozzle resting on a concrete surface next to a puddle of spilled liquid
Illustration: Tradingbird

Iowa’s average diesel price reached $6.19 per gallon, a new all-time high. Gasoline costs also spiked by 35 cents since last Friday. Drivers face significantly higher fuel expenses than a year ago.

The statewide average price for a gallon of diesel fuel in Iowa has reached $6.19. This marks the highest price recorded in the state’s history. The cost for standard gasoline has also climbed sharply. The average price for a gallon of gas is now $4.40. This represents a 35-cent increase since last Friday.

According to data from GN auto markets/energy: crude oil prices, these figures reflect a sudden shift in the market. Last year at this time, the average gas price was $2.99. Diesel cost $3.53 per gallon during the same period last year. The current price jump has disrupted typical seasonal trends.

Supply constraints drive global crude costs

Brian Ortner, a spokesman for AAA-Iowa, cites geopolitical factors for the rise. Conflict in the Middle East has disrupted supply chains. Transport through the Strait of Hormuz is currently limited. These issues affect the global supply of crude oil.

Crude oil accounts for more than 50 percent of pump prices. Market prices for crude oil have exceeded $100 per barrel. This increase directly translates to higher costs at the pump. The rapid rise in prices has surprised many motorists.

Seasonal price decline has not materialized

Prices typically begin to drop in September and October. Refineries switch from summer blends to winter blends. Demand usually decreases as schools reopen and vacations end. However, the current supply issues have overridden this seasonal trend.

In some parts of Iowa, prices rose by 25 cents or more overnight on Wednesday. The current average of $4.40 is well above the $2.99 seen a year ago. Diesel prices have risen from $3.53 to $6.19 in the same period. This represents a significant financial burden for drivers.

Regional price variations across the state

Prices vary by location within Iowa. Dubuque currently has the highest gas prices in the state. Davenport reports the lowest average prices. These regional differences reflect local supply and demand dynamics. The statewide averages do not capture these local variations.

Based on reporting by Radio Iowa, compiled by the Tradingbird desk.

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