IOWA-MISSOURI -- Average retail gasoline prices in Iowa have fallen 4.0 cents per gallon in the past week, averaging $3.62 per gallon Sunday. This compares with the national average that has fallen 4.2 cents per gallon in the last week to $3.61 per gallon, according to gasoline price website IowaStateGasPrices.com.

Including the change in gas prices in Iowa during the past week, prices Sunday were 88.6 cents per gallon higher than the same day one year ago and are 9.9 cents per gallon higher than a month ago.

Average retail gasoline prices in Missouri have fallen 8.2 cents per gallon in the past week, averaging $3.35 per gallon Sunday.

Including the change in gas prices in Missouri during the past week, prices Sunday were 78.7 cents per gallon higher than the same day one year ago and are 4.5 cents per gallon lower than a month ago according to gasoline price website MissouriGasPrices.com.

"It took the end of summer for a drop in retail gasoline prices, but I'm sure motorists won't complain that we're finally seeing some drops in prices," said Patrick DeHaan, GasBuddy.com Senior Petroleum Analyst. "We've seen wholesale prices continue to be somewhat volatile, but I believe as we enter October we'll see markets slowly quiet down with retail gasoline prices falling to $3.35-$3.55 on average by Thanksgiving, with the exception being typical hotspots on the West Coast," DeHaan adds.

The national average has increased 2.4 cents per gallon during the last month and stands 88.0 cents per gallon higher than this day one year ago.

Information provided by IowaStateGasPrices.com and MissouriGasPrices.com