Maine’s average price for regular gasoline rose to its highest point since August 2022, as the conflict in Iran continues to drive up global oil costs.

A gallon of regular gas averaged $4.03 here Tuesday, ticking up more than 6 cents overnight, according to data aggregated by motor club AAA. That price has risen 38.5% — about $1.12 — since Feb. 28, when the United States and Israel struck Iran, triggering a conflict that has since spilled into the broader Middle East.

Maine’s average price crossed the $4 threshold a week after the national average did so. The national average was up to $4.14 Tuesday, AAA data shows.

Premium gas was up to $5.07 per gallon in Maine, topping $5 for the first time in nearly four years. Diesel, meanwhile, averaged about $5.90 per gallon Tuesday.

Collectively, those figures mark the state’s highest average gas prices since the summer of 2022, when the Russian invasion of Ukraine drove gas prices to record highs. A gallon of regular gas peaked at $5.09 that June, the highest ever recorded by AAA.

This week, Maine’s prices were the 21st highest among the 50 states and Washington, D.C., according to AAA. California, Hawaii, Washington, Nevada and Oregon all saw average prices above $5 per gallon Tuesday.

This is a developing story.