Diesel and gasoline prices rise across the U.S., impacting trucking operations and fleet costs

Fleets face higher on-highway fuel costs as national diesel and gas averages climb, with the West Coast seeing the largest increase.

Jenna Hume

Sept. 10, 2025

2 min read

Key takeaways

Diesel prices rose nationwide, with the West Coast seeing the largest increase this week.
Gasoline costs show regional variation, with price declines in the Midwest and Gulf Coast.
National fuel averages are higher than last year, signaling ongoing operational cost pressures.

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As the weather in the U.S. begins to cool down, diesel and gas prices are only going up. The national average on-highway diesel price rose 3 cents to $3.766, according to data released by the U.S. Energy Information Administration (EIA) on September 8. Gas prices rose 2 cents to $3.192.

What are the current diesel prices across the U.S.?

Here are this week’s diesel price highlights from each region of the U.S.:

West Coast: The biggest increase in diesel prices in the U.S. this week was seen along the West Coast for 5 cents to $4.533. Without including California, diesel prices rose 5 cents to $4.163.
Gulf Coast: Along the Gulf Coast, diesel prices rose 4 cents to $3.404.
Midwest: In the Midwest, diesel prices rose 3 cents to $3.754.
East Coast: Along the East Coast, diesel prices rose 2 cents to $3.772.
Rocky Mountain: In the Rockies, diesel prices rose 0.1 cents to $3.754.

According to AAA Motor Club (AAA), the current national diesel price average is $3.704. This is 6 cents lower than EIA’s current estimate and 6 cents higher than this time last year.

What are the current gasoline prices across the U.S.?

The current national average on-highway gasoline price is $3.192, according to EIA, 2 cents higher than last week’s average.

Here are this week’s gasoline price highlights from each region of the U.S.:

Rocky Mountain: The biggest increase in gas prices in the U.S. this week was in the Rockies, where prices rose by 6 cents to $3.240.
East Coast: Along the East Coast, gas prices rose 5 cents to $3.063.
West Coast: Along the West Coast, gas prices rose 5 cents to $4.194. Without including California, gas prices rose 7 cents to $3.946.
Midwest: In the Midwest, gas prices dropped 3 cents to $3.055.
Gulf Coast: Along the Gulf Coast, gas prices dropped 3 cents to $2.733.

The current national gasoline price average is $3.193, according to AAA. This is 0.1 cent higher than EIA’s current estimate and 8 cents lower than this time last year.

About the Author

Jenna Hume

Digital Editor

Digital Editor Jenna Hume joined FleetOwner in November of 2023 and previously worked as a writer in the gaming industry. She has a bachelor of fine arts degree in creative writing from Truman State University and a master of fine arts degree in writing from Lindenwood University. She is currently based in Missouri.