The average gas price in Michigan dropped 12 cents on Sunday, July 22, from a week ago to $3.15 a gallon, falling back almost to the national average. "Michigan drivers are seeing lower prices at the pump," said Adrienne Woodland, a spokeswoman for AAA. "If demand drops, alongside increasing stocks, gas prices may continue to fall."

Gas prices in Michigan have dropped 12 cents from last week, according to AAA. Drivers in the state are now paying an average of $3.15 per gallon for regular unleaded, which is 15 cents less than this time last month and 50 cents less than this time last year.

The national average price of gasoline has dropped by 2 cents, at $3.09 on Monday, according to GasBuddy. The company says the nation's price stands 38 cents per gallon lower than last year, according to data compiled from more than 11 million weekly price reports covering some 150,000 gas stations across the country.