Average retail gasoline prices in Michigan have fallen 1.5 cents per gallon in the past week, averaging $3.45 a gallon Sunday.

This compares with the national average that has fallen 3.2 cents per gallon in the last week to $3.46 a gallon, according to gasoline price website MichiganGasPrices.com.

Including the change in gas prices in Michigan during the past week, prices yesterday were 0.5 cents per gallon higher than the same day one year ago and are 34.9 cents per gallon lower than a month ago. The national average has decreased 32.6 cents per gallon during the last month and stands 3.1 cents per gallon higher than this day one year ago.

“The national average has again decreased in the last week, but the decreases are beginning to slow down,” said GasBuddy.com Senior Petroleum Analyst Patrick DeHaan. “Wholesale gasoline prices rose strongly on Friday, which could send prices higher in states with among the lowest prices in the United States. The fuel tightness has also continued in NYC — for those in Sandy’s wake, fuel availability remains difficult, and is the reason GasBuddy has implemented an emergency fuel availability service.”

The Hurricane Sandy fuel availability site can be found by navigating to http://www.gasbuddy.com/sandy/.

GasBuddy operates MichiganGasPrices.com and over 250 similar websites that track gasoline prices at over 140,000 gasoline stations in the United States and Canada. In addition, GasBuddy offers a free smartphone app, which has been downloaded over 20 million times to help motorists find gasoline prices in their area. In Michigan, GasBuddy tracks price changes at 4,913 retail outlets.