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U.S. gas prices in September 2025
Regular gasoline in the United States averaged $3.166 per gallon in September 2025, based on 5 weekly EIA readings. That is 3.3 cents higher than in August 2025. Compared with September 2024, prices were 4.8 cents lower.
Diesel averaged $3.748 per gallon, about the same as in August 2025.
Weekly regular price in September 2025
The lowest weekly average was $3.118 (week of Sep 29, 2025) and the highest $3.192 (week of Sep 8, 2025).
National averages: September 2025
| Fuel | September 2025 | August 2025 | September 2024 |
|---|---|---|---|
| Regular gasoline | $3.166 | $3.133 | $3.214 |
| Diesel | $3.748 | $3.744 | $3.558 |
Cheapest and most expensive states
Among the states EIA tracks individually, Texas had the cheapest regular gas in September 2025 at $2.712 per gallon, while California was the most expensive at $4.440 – a gap of $1.73 per gallon, or about $25.92 on a 15-gallon fill-up. The biggest monthly move was in California (up 15.0 cents), while Ohio changed down 17.1 cents.
| State | Regular, avg | vs last month | vs last year |
|---|---|---|---|
| Texas | $2.712 | +$0.008 | −$0.015 |
| Ohio | $2.976 | −$0.171 | −$0.113 |
| Florida | $2.977 | +$0.022 | −$0.134 |
| Minnesota | $3.014 | +$0.081 | −$0.071 |
| Massachusetts | $3.060 | +$0.018 | −$0.084 |
| Colorado | $3.066 | +$0.091 | −$0.303 |
| New York | $3.129 | +$0.057 | −$0.104 |
| Washington | $4.432 | +$0.134 | +$0.453 |
| California | $4.440 | +$0.150 | −$0.014 |
See each state's history: Texas · Ohio · Florida · Minnesota · Massachusetts · Colorado · New York · Washington · California.
Regions (PADD)
| Region | Regular, avg | vs last month | vs last year |
|---|---|---|---|
| Gulf Coast (PADD 3) | $2.732 | +$0.020 | −$0.028 |
| Lower Atlantic (PADD 1C) | $2.907 | −$0.004 | −$0.112 |
| Midwest (PADD 2) | $3.012 | −$0.016 | −$0.079 |
| East Coast (PADD 1) | $3.021 | +$0.020 | −$0.095 |
| New England (PADD 1A) | $3.077 | +$0.028 | −$0.076 |
| Central Atlantic (PADD 1B) | $3.179 | +$0.055 | −$0.079 |
| Rocky Mountain (PADD 4) | $3.179 | +$0.027 | −$0.222 |
| West Coast excluding California | $3.992 | +$0.200 | +$0.280 |
| West Coast (PADD 5) | $4.225 | +$0.174 | +$0.126 |
Major cities
Of the metro areas in the EIA survey, Houston was the cheapest in September 2025 ($2.664) and Seattle the most expensive ($4.572).
| City | Regular, avg | vs last month | vs last year |
|---|---|---|---|
| Houston | $2.664 | −$0.005 | −$0.057 |
| Miami | $3.013 | +$0.056 | −$0.145 |
| Cleveland | $3.054 | −$0.071 | −$0.055 |
| Denver | $3.060 | +$0.069 | −$0.273 |
| New York City | $3.073 | +$0.046 | −$0.044 |
| Boston | $3.083 | −$0.005 | −$0.084 |
| Chicago | $3.545 | +$0.071 | −$0.067 |
| San Francisco | $4.420 | +$0.048 | −$0.348 |
| Los Angeles | $4.445 | +$0.223 | +$0.159 |
| Seattle | $4.572 | +$0.135 | +$0.332 |
Oil prices and gas prices
Brent crude averaged $68.01 per barrel in September 2025. Crude oil is the biggest single part of the pump price, but taxes, refining margins, seasonal fuel blends and local supply also matter. See the live oil price page.
FAQ
What was the average price of gas in September 2025?
Regular gasoline averaged $3.166 per gallon in the United States in September 2025, according to the weekly EIA survey.
What was the average price of diesel in September 2025?
Diesel averaged $3.748 per gallon nationally in September 2025.
Which state had the cheapest gas in September 2025?
Texas had the lowest average among the states EIA tracks individually: $2.712 per gallon.
Source: U.S. Energy Information Administration (EIA), weekly retail gasoline and diesel prices (public domain). Monthly figure = average of the weekly Monday readings in the month. Calculations by FuelPriceAtlas.
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