Michigan’s gas prices have surpassed the record set for highest prices all year in just one week, rising to an average of $3.91 per gallon for regular gas from $3.76 last week.

Average prices per gallon have risen 37 cents in the last month, according to AAA.

The state’s average is higher than the national average, $3.82 per gallon for regular. Michigan motorists are paying an average of $58.65 to fill 15-gallon tanks.

National demand for gas jumped from 8.84 million to 9.30 million barrels per day last week, while supply for domestic gasoline decreased from 219.1 million to 216.4 million barrels, according to data from the Energy Information Administration. Higher demand, amid tighter supply, keeps prices high.

“Gas prices across Michigan continue to rise, reaching another milestone for high prices this year,” said Adrienne Woodland, spokesperson for AAA Michigan. “If gas demand remains high, alongside increasing oil prices, drivers should brace for increases in pump prices.”

The Associated Press reported this month that Saudi Arabia will continue to cut oil production to 1 million barrels each day until September, which may be a contributing factor to high gas prices in the United States.

Severe weather including heavy storms and hurricanes could limit the capacity of domestic oil refineries. The ongoing heatwave in the Gulf Coast region hasn’t helped because oil refineries have had to slow down production.

According to AAA, here’s the average cost of a gallon of gas across Michigan:

• Metro Detroit: $3.87
• Ann Arbor: $3.93
• Benton Harbor: $3.93
• Traverse City: $3.94
• Flint: $3.95 per gallon
• Saginaw/Bay City/Midland: $3.95
• Lansing/East Lansing: $3.96
• Grand Rapids/Muskegon/Holland: $3.97
• Jackson: $3.97
• Marquette $3.97