AAA Michigan says average gas prices statewide are down about 11¢ from a week ago to about $2.80 per gallon. The auto club says the average price for regular is about 13¢ less than a year ago. AAA described the drop as a surprise and said it could be a result of unpredictable weather curbing demand. Typically, gas prices rise heading toward the Memorial Day holiday. The state’s highest average was about $2.85 a gallon in the Marquette area, the lowest is in Flint at $2.71. Prices locally in Benton Harbor and St. Joseph are averaging $2.79, down 11¢ from last week. In South Haven, GasBuddy puts the average even lower, coming in at $2.69.