COLUMBUS, Ohio (WTVN)--Gas prices usually go down after Labor Day, but in 2012, central Ohio motorists didn't see that happening until sometime in October.

According to, average retail gasoline prices in Columbus have fallen 16.9 cents per gallon in the past week, averaging $3.32/gallon.

The state average of $3.33 is down 15 cents from last week, according to AAA's Daily Fuel Gauge Report.

Experts attribute the price drop this fall to a variety of factors. Those include relatively problem-free refinery operations and increased supply while demand decreases with the close of the summer driving season.

"Gasoline prices continue to erode with twelve states that are seeing prices under $3/gallon, and more states will join in on that over the next seven days" said Senior Petroleum Analyst Patrick DeHaan.

"While it's generally good news that gasoline prices continue falling, many Americans don't believe we're likely to see national averages drop under $3 a gallon over the next year at the pump," DeHaan said.