As of Friday, August 30, 2013
Average retail gasoline prices in Washington have fallen 5.2 cents per gallon in the past week, averaging $3.73 per gallon on Sunday, according to GasBuddy's daily survey of 2,666 gas outlets in Washington.
This compares with the national average that has fallen 0.4 cents per gallon in the last week to $3.57 per gallon, according to gasoline price website GasBuddy.com.
Including the change in gas prices in Washington during the past week, prices Sunday were 26.7 cents per gallon lower than the same day one year ago and are 17.5 cents per gallon lower than a month ago.
The national average has decreased 9.5 cents per gallon during the last month and stands 16.6 cents per gallon lower than this day one year ago.