CASPER, Wyo. — Just one week after a 13-cent price hike ended Natrona County’s five-month streak of offering Wyoming’s cheapest fuel, a nearly 10-cent drop has returned the title.

That drop comes despite the nation’s average ticking upward for the first time in three weeks, rising 3.4 cents compared to a week ago to stand at $3.12 per gallon today, according to GasBuddy data compiled from more than 12 million individual price reports. The national average is down 2.1 cents from a month ago and is 18.3 cents per gallon lower than a year ago.

The national average price of diesel decreased 2 cents in the last week and stands at $3.65 per gallon.

“The national average saw a modest increase over the last week after storms temporarily knocked the Midwest’s largest refinery offline in Indiana, triggering sharp jumps in gas prices across Ohio, Wisconsin and Michigan,” said Patrick De Haan, head of petroleum analysis at GasBuddy. “We could soon see prices cycle higher in Illinois and Indiana as well, although there’s been some late-week relief in wholesale prices now that the refinery is restarting. Meanwhile, Florida saw the nation’s largest weekly decline, but a rebound due to price cycling is likely on the horizon.

“All of this is playing out while oil prices remain relatively stable in the low $60s. With no major hurricanes threatening the U.S. at the moment, the biggest wildcard remains any shifts in Russia’s war on Ukraine. For now, expect only moderate gas price fluctuations, with the potential for lower prices arriving later this fall.”

On Monday, AAA reported that the national average price for a gallon of regular gasoline is $3.16, up 3 cents compared to last week. In Wyoming, the average is $3.09, up 1 cent from last week. Natrona County’s gas price fell 9 cents to $2.71, once again becoming Wyoming’s cheapest average price.

Last week’s title taker, Laramie County, saw a 19-cent hike compared to last week, bringing its average to $2.86, now the state’s third cheapest. Albany County was third last week, but a 5-cent drop to $2.83 gives it the state’s second cheapest average this week, per AAA.

(AAA graphic)

The cheapest fuel in Natrona County on Monday was $2.56 at Sam’s Club at 4600 E. 2nd St. and Flying J at 41 SE Wyoming Blvd. in Casper, and Maverik, Highway 26 Poison Spider Road in Mills, according to GasBuddy reports.

Also included in GasBuddy’s report:

OIL MARKET DYNAMICS
Oil prices have seen some upward momentum after comments from Jerome Powell last week, hinting that a weakening jobs market could finally pave the way for interest rate cuts, which would offer support for global oil demand. In addition, the prospects of a peace deal between Russia and Ukraine seemed to diminish, which could push President Trump to sanction Russian oil more severely, leading to reduced oil flow. In early Monday trade, a barrel of WTI crude oil was up 42 cents to $64.08 per barrel, up from last week’s $62.90 per barrel start. Brent crude oil was also higher in early trade, rising 37 cents to $68.10 per barrel, also up from last Monday’s $65.92 start. While oil has seen limited upward move, OPEC+’s continued production increases will likely keep somewhat of a ceiling on any potential rally in oil, though renewed Ukrainian attacks on Russian oil infrastructure could temporarily boost prices.

OIL AND REFINED PRODUCT SUPPLIES
The EIA’s Weekly Petroleum Status Report for the week ending August 15, 2025, showed U.S. oil inventories fell by 6.0 million barrels, and are about 6% below the seasonal average for this time of year, while the SPR rose 200,000 barrels to 403.4 million. Gasoline inventories fell by 2.7 million barrels and stand 1% below the five-year seasonal average, while distillate inventories rose 2.3 million barrels and are about 13% below the five-year seasonal average. Refinery utilization rose 0.2 percentage points to 96.6%, while implied gasoline demand, EIA’s proxy for retail demand, fell 158,000 bpd to 8.842 million barrels per day.

GAS PRICE TRENDS
The most common U.S. gas price encountered by motorists stood at $2.99 per gallon, unchanged from last week, followed by $2.89, $3.19, $2.79, and $3.09, rounding out the top five most common prices.

The median U.S. gas price is $2.99 per gallon, up 1 cent from last week and about 13 cents lower than the national average.

The top 10% of stations in the country average $4.38 per gallon, while the bottom 10% average $2.54 per gallon.

The states with the lowest average prices: Oklahoma ($2.62), Mississippi ($2.66), and Louisiana ($2.68).

The states with the highest average prices: California ($4.50), Hawaii ($4.36), and Washington ($4.35).

Biggest weekly changes: Ohio (+32.5¢), Wisconsin (+23.5¢), Michigan (+19.8¢), Florida (-13.0¢), Delaware (+12.0¢)

DIESEL PRICE TRENDS
The most common U.S. diesel price stood at $3.49 per gallon, down 20 cents from last week, followed by $3.69, $3.59, $3.39, and $3.79, rounding out the top five most common prices.

The median U.S. diesel price is $3.55 per gallon, down 4 cents from last week and about 10 cents lower than the national average.

Diesel prices at the top 10% of stations in the country average $4.67 per gallon, while the bottom 10% average $3.01 per gallon.

The states with the lowest average diesel prices: Texas ($3.14), Mississippi ($3.23), and Louisiana ($3.24).

The states with the highest average diesel prices: Hawaii ($5.25), California ($5.06), and Washington ($4.98).

Biggest weekly changes: Florida (-10.6¢), Idaho (-5.5¢), Alaska (-5.3¢), Utah (-4.7¢), New Hampshire (-4.6¢)

Related