In the week ending Oct. 31, one gas station in Poweshiek County sold diesel gas at the lowest reported price of $5.94 per gallon, according to customer reports submitted to GasBuddy.
Countywide, diesel gas averaged $6.05 per gallon.
Among 18 gas stations in cities within Poweshiek County, nine offered diesel gas.
The statewide average price of diesel gas in Iowa was $6.10 per gallon for the week ending Oct. 31, a decrease from the previous week.
U.S. gasoline prices averaged $4.33 per gallon in September 2026, the highest September average on record, according to AAA. That was 50 cents above the previous September record of $3.83 set in 2023. Prices began declining in early October as crude oil prices fell back into the $90-per-barrel range.
Conflict in the Middle East contributed to higher oil prices during the third quarter of 2026, according to the U.S. Energy Information Administration. Brent crude oil futures rose from $72 per barrel on July 1 to a peak of $109 on Sept. 15 amid renewed military strikes and disruptions to shipments through the Strait of Hormuz. Attacks on energy infrastructure in Russia and the Middle East also affected supplies, while slower releases from the U.S. Strategic Petroleum Reserve limited additional supplies in September.
Crude oil and fuel prices rose during the third quarter of 2026 amid disruptions to Middle Eastern supplies, according to the U.S. Energy Information Administration. U.S. refineries operated at an average 95% of capacity, yet the average gasoline crack spread, a measure of refining margins, more than doubled from a year earlier as global fuel supplies tightened. U.S. gasoline inventories were 7% below their 2021-25 average in late September, 2026.
Gas price data reflects cash payments. Some stations may charge higher prices for credit card transactions due to processing fees, though such surcharges are prohibited in some states and territories.
Data is accurate as of press time, but gas prices have been known to fluctuate on a daily, and even hourly, basis.
VictorMontezumaBrooklynGrinnell$5.96$5.96$5.96$5.96$5.96$5.96$5.94$5.94
Information in this article was obtained from GasBuddy. The source data can be found here.