Prices at the pump spiked temporarily as a result of disruptions to Texas oil refineries caused by Hurricane Harvey, which made landfall on Aug. 25.
But in the week ending Sunday, a gallon of regular gas cost $2.456, down more than 8 percent from the post-hurricane high of $2.673 on Sept. 7, according to GasBuddy.com.
The trend of lower gas prices is expected to continue, despite an increase of around 2 cents Monday to $2.478 amid fears of supply disruptions after Iraqi forces tried to seize oil fields in the Kurdish-held city of Kirkuk in northern Iraq. The assault aims to prevent Kurdish efforts to create an independent state in that part of the country.
The Iraq-Kurd confrontation pushed up the cost of a barrel of Brent crude, a benchmark for global oil prices, by 65 cents, or 1.1 percent, Monday to $57.82 per barrel.
U.S.-produced crude, which has been on an upswing since falling into a low-$40 per barrel range in June, also inched higher. It rose 42 cents per barrel, or about 0.8 percent, to $51.87. Prices were off their highs for the day.
The limited effect of events in the Middle East on U.S. gas prices is due to reports that suggest oil was flowing normally in the Kirkuk area, analysts said.
"We haven't really seen any impact to global supply," says Jeanette Casselano, a spokesperson at AAA, adding that oil analysts will monitor the situation for any signs of market disruption.
The pain at the pump caused by Hurricane Harvey, which knocked out more than 25 percent of refining capacity in the U.S. Gulf Coast region, was short-lived. And there's a good chance gas prices will fall back to where they were before the Category 4 storm caused major industry outages, says Patrick DeHaan, head of petroleum analysis at GasBuddy.com.
"Gas prices are now slowly meandering to the downside," DeHaan says.
Here's why gas prices are seen falling further as the year winds down: