CASPER, Wyo. — Despite a second consecutive week of rising national gas prices, drivers in Casper are seeing a much smaller bump at the pump, with Natrona County’s average price ticking up only slightly.

The national average now sits at $3.11 per gallon, a 1.2-cent increase from a week ago, according to GasBuddy data, while AAA reports Wyoming’s state average rose by just a cent to $3.09.

GasBuddy says the national average is up 1.3 cents from a month ago and is 32.8 cents per gallon lower than a year ago. The national average price of diesel has decreased 0.1 cents in the last week and stands at $3.708 per gallon.

“It was another relatively tame week at the pump, with the national average inching up for the second straight week as oil prices briefly touched the $70 per barrel mark before sliding late in the week on news that OPEC+ will raise oil production again in September,” said Patrick De Haan, head of petroleum analysis at GasBuddy. “While price cycling led gas prices in some states to see double-digit increases or decreases, most saw only modest fluctuations.

“With OPEC+ now fully restoring production to 2023 levels — and fresh economic concerns arising from a weak jobs report and renewed tariff threats — oil prices may continue to face headwinds, potentially paving the way for a decline in gas prices in the weeks ahead.”

On Monday, AAA reported that the national average price for a gallon of regular gasoline is $3.15, up 1 penny from last week. In Wyoming, the average is $3.09, which is also up 1 cent over last week. Natrona County’s gas price is $2.71, which is 11 cents cheaper than Laramie County’s $2.82, also down 10 cents from last week. It’s the 18th straight week that Natrona County has offered the state’s lowest gas prices.

For three weeks running, Converse County has offered Wyoming’s third cheapest gas, this week at $2.90, down 2 cents, according to AAA.

(AAA graphic)

The cheapest fuel in Natrona County on Monday was $2.55 at Exxon, 400 Valley Drive, followed by $2.58 at Maverik, Highway 26 Poison Spider Road, and Sinclair, 5076 W. Yellowstone Highway, according to GasBuddy reports.

Also included in GasBuddy’s report:

OIL PRICES
With OPEC agreeing over the weekend to another increase in production starting in September, they’ve effectively ended the 2023-era production cuts. Effective for September, OPEC is boosting oil production by 547,000 barrels per day, reversing the 2.2 million barrels-per-day cuts enacted in 2023 when oil prices fell below $70. In early Monday trade, WTI crude oil was down $1.61 per barrel to $65.72, down from $66.46 a week ago, while Brent crude oil was down $1.45 to $68.22 per barrel, down from $69.77 last Monday. Going forward, oil prices may encounter headwinds after the higher summer demand begins to fade, potentially putting U.S. oil production at risk with lower oil prices. “Oil prices saw an increase in the first part of last week, driven by secondary sanction/tariff fears on buyers of Russian oil, with prices paring their gains following economic growth concerns in the second part of the week from weaker-than-expected U.S. employment data. Also, the decision of OPEC+ eight-member states with additional voluntary cuts to increase their production quota by nearly 550,000 bpd for September weighed on prices. The market focus will now shift to what President Trump will decide for buyers of Russian oil later this week,” commented UBS commodities analyst Giovanni Staunovo, in an e-mail.

OIL AND REFINED PRODUCT SUPPLIES
The EIA’s Weekly Petroleum Status Report for the week ending July 25, 2025, showed U.S. oil inventories rose by 7.7 million barrels, and are about 6% below the seasonal average for this time of year, while the SPR rose 200,000 barrels to 402.7 million. Gasoline inventories fell by 2.7 million barrels and stand 1% below the five-year seasonal average, while distillate inventories rose 3.6 million barrels and are about 16% below the five-year seasonal average. Refinery utilization fell 0.1 percentage points to 95.4%, while implied gasoline demand, EIA’s proxy for retail demand, rose 185,000 bpd to 9.152 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, $2.79, $3.19, and $3.29, rounding out the top five most common prices.

The median U.S. gas price is $2.99 per gallon, unchanged from last week and about 12 cents lower than the national average.

The top 10% of stations in the country average $4.39 per gallon, while the bottom 10% average $2.50 per gallon.

The states with the lowest average prices: Oklahoma ($2.67), Mississippi ($2.67), and Texas ($2.72).

The states with the highest average prices: California ($4.45), Hawaii ($4.43), and Washington ($4.35).

Biggest weekly changes: Indiana (+18.9¢), Florida (-12.7¢), Ohio (+10.8¢), Virginia (+10.0¢), Delaware (+9.9¢)

DIESEL PRICE TRENDS
The most common U.S. diesel price stood at $3.59 per gallon, up 10 cents from last week, followed by $3.49, $3.69, $3.79, and $3.39, rounding out the top five most common prices.

The median U.S. diesel price is $3.59 per gallon, up 4 cents from last week and about 12 cents lower than the national average.

Diesel prices at the top 10% of stations in the country average $4.64 per gallon, while the bottom 10% average $3.12 per gallon.

The states with the lowest average diesel prices: Texas ($3.26), Mississippi ($3.30), and Louisiana ($3.34).

The states with the highest average diesel prices: Hawaii ($5.27), California ($5.13), and Washington ($5.03).

Biggest weekly changes: Delaware (+12.1¢), Maryland (+10.8¢), Florida (-10.0¢), Virginia (+8.7¢), Hawaii (+7.3¢)

Related