Average retail gasoline prices in Wyoming have fallen 4.7 cents per gallon in the past week, averaging $2.75/g yesterday, according to GasBuddy's daily survey of 494 gas outlets in Wyoming. This compares with the national average that has fallen 12.8 cents per gallon in the last week to $2.47/g, according to gasoline price website GasBuddy.com.

Including the change in gas prices in Wyoming during the past week, prices yesterday were 85.6 cents per gallon lower than the same day one year ago and are 5.4 cents per gallon lower than a month ago. The national average has decreased 19.5 cents per gallon during the last month and stands 96.4 cents per gallon lower than this day one year ago.

"Nationally, gas prices saw their largest weekly drop of the year," said Patrick DeHaan, GasBuddy senior petroleum analyst. "Prices moved lower in all but one state, Utah, with plunges at the pump throughout the Great Lakes as a result of BP's Whiting, Indiana refinery coming back online. The national average now stands at its lowest point since April, a fitting way to close out the summer driving season with Labor Day approaching. While oil prices rallied late last week, I don't yet expect it to impact pump prices, as they still have some catching up to do with the drop in crude oil prices. Since June 30, oil prices have fallen 23% while retail gasoline prices have fallen about half that amount, so gasoline prices will move lower again this week," DeHaan said.