End of September Diesel Trends Update
The average price of a gallon of diesel increased nationally and in four of five regions, as reported at the start of this week. The national average increased by 1 cent from last week and is 21 cents higher than a year ago.
This week, the average price of diesel fuel increased nationally, as well as in four of the five regions. One region remained unchanged.
Photo: Work Truck/EIA
According to the most recent report by the U.S. Energy Information Administration (EIA), the national average cost of diesel fuel at the start of this week was higher than the previous week, and four of five regions also reported small increases.
The national average price per gallon of diesel fuel in the U.S. increased by ½ of a cent as of Sept. 29, 2025. The national average price of $3.75 per gallon is 21 cents higher than it was at the same time last year.
This week, regional average prices increased in four regions. The regional price average increases ranged from ½ of a cent in the East Coast region to 1.5 cents in the Rocky Mountain region. The East Coach region saw a small price decrease of less than 1 cent, while the Midwest Region average price was unchanged.
All regions averaged higher prices than the same period last year. The West Coast has the most significant difference, more than 30 cents higher than this time last year.
The most expensive place to buy diesel is Hawaii, at $5.22 per gallon, and the least costly is Texas, at $3.19 per gallon.
Regional Diesel Prices: End of September
Average diesel prices reported by region, as of Sept. 29, were:
East Coast: $3.75
Midwest: $3.73
Gulf Coast: $3.41
Rocky Mountain: $3.73
West Coast: $4.53
Regional Diesel Prices: 4th Week of September
This week, the average price of diesel fuel increased nationally, as well as in four of the five regions.
Photo: Work Truck/EIA
Average diesel prices reported by region, as of Sept. 22, were:
East Coast: $3.74
Midwest: $3.73
Gulf Coast: $3.40
Rocky Mountain: $3.74
West Coast: $4.52
Regional Diesel Prices: 3rd Week of September
This week, the average price of diesel fuel decreased nationally and in every region.
Photo: Work Truck/EIA
Average diesel prices reported by region, as of Sept. 15, were:
East Coast: $3.75
Midwest: $3.71
Gulf Coast: $3.39
Rocky Mountain: $3.72
West Coast: $4.52
Regional Diesel Prices: 2nd Week of September
This week, the average price of diesel fuel increased nationally and in every region.
Photo: EIA/Work Truck
Average diesel prices reported by region, as of Sept. 8, were:
East Coast: $3.77
Midwest: $3.75
Gulf Coast: $3.40
Rocky Mountain: $3.75
West Coast: $4.53
Regional Diesel Prices: 1st Week of September
This week, the average price of diesel fuel increased across the board, both nationally and in every region.
Photo: EIA/Work Truck
Average diesel prices reported by region, as of Sept. 3, were:
East Coast: $3.75
Midwest: $3.72
Gulf Coast: $3.36
Rocky Mountain: $3.75
West Coast: $4.48
Regional Diesel Prices: 4th Week of August
This week, the national average price of diesel dropped slightly. All but one region, the West Coast, had lower price averages, but slightly.
Photo: EIA/Work Truck
Average diesel prices reported by region, as of Aug. 26, were:
East Coast: $3.72
Midwest: $3.70
Gulf Coast: $3.33
Rocky Mountain: $3.75
West Coast: $4.46
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