UNITED STATES / RankWire.AI / – On September 5, the average price for diesel fuel across the United States hit a new high of $5.8819 per gallon, continuing a sharp upward trend nationwide. This marks an increase from the $3.7123 per gallon recorded a year earlier. Meanwhile, regular gasoline averaged $4.1459, rising from $3.2046 during the same period last year. Diesel has now surpassed the previous record set in June 2022, resulting in the highest fuel costs on record for truckers, farmers, and other major diesel consumers.
The recent surge followed a national diesel average of $5.85 per gallon on September 4, which already exceeded the former peak. The next day, prices increased again, with diesel now costing over $2.16 more per gallon than a year ago. While gasoline prices have also risen, their national average remains below the 2022 record. Contributing factors include rising crude oil prices and tighter supplies of refined fuels, which have driven recent increases across U.S. energy markets.
According to AAA, the September 5 national diesel average was $5.8819, topping the previous record of $5.816 set on June 19, 2022. California continues to have the highest diesel prices among major markets, with an average close to $7.81 per gallon. Regular gasoline in the state is around $5.85. Variations in regional pump prices are influenced by taxes, refinery access, fuel standards, and transportation costs, creating significant differences between coastal markets, inland states, and key fuel-producing areas.
Global Fuel Supply Constraints Drive Diesel Price Surge
U.S. Energy Information Administration reported an on-highway diesel average of $5.599 per gallon for the week ending August 31. Its upcoming update is scheduled for September 9, due to the Labor Day holiday. Wholesale diesel prices remain high across major U.S. trading hubs as refiners face increased crude costs and international supply disruptions limit fuel flows. These pressures have kept diesel markets tight despite high refinery utilization domestically.
Oil prices climbed again on September 7 amid tensions involving the United States and Iran, which disrupted shipping in the Gulf. Brent crude traded above $97 a barrel, and West Texas Intermediate exceeded $92. Shipping through the Strait of Hormuz slowed, handling significant crude and refined product shipments from Gulf producers. Attacks on Russian refineries have further reduced processing capacity, tightening global supplies of diesel and other refined fuels.
Rising Fuel Costs Impact Freight and Agriculture Sectors
Diesel fuels much of the U.S. freight network and remains vital for industries like agriculture. Long-distance trucks rely on it for transporting goods between ports, warehouses, factories, and retail outlets. Farmers use diesel-powered tractors, harvesters, and machinery. Construction, commercial fleets, and some rail systems also depend heavily on diesel. The recent price increase has led to higher operational costs across transportation, farming, and construction sectors. Its extensive industrial role amplifies diesel’s economic impact beyond passenger vehicle fuel.
Despite U.S. crude production staying near historic highs, diesel prices are affected by various supply chain components, including refining capacity, inventories, shipping routes, and international fuel flows. Disruptions in global refining and seasonal demand for freight and agriculture have kept supplies tight. As of September 5, the national diesel average was approximately 58% higher than a year earlier, underscoring diesel’s position as one of the fastest-growing major transportation fuels in the country.