Gasoline prices are up nearly 80 cents from a month ago.
Diesel prices have increased by $1.34, now just under $5 a gallon.
The rise in fuel prices is linked to the ongoing conflict in Iran.
Briefing: Gasoline prices are still rising as the Iran war stretches into its third week
Strategic angle: U.S. gasoline prices have surged nearly 80 cents in a month, with diesel prices climbing even higher.