Average gasoline prices in Billings jumped 8.8 cents per gallon in the past week, averaging $3.03 per gallon Sunday, according to gasbuddy.com's daily survey of 81 gas outlets in Billings.
The national average rose 14.4 cents per gallon last week to $3.48 per gallon.
Billings gas prices Sunday were 0.6 cents per gallon lower than one year ago and are 1.4 cents per gallon higher than a month ago. The national average has increased 21.1 cents per gallon during the last month and stands 4.4 cents per gallon higher than one year ago.
"The national average has ticked higher in the last week, as rising oil prices have put upward pressure on gasoline prices," said Patrick DeHaan, gasbuddy.com senior petroleum analyst.
"Unfortunately for angry motorists, there doesn't seem to be much relief in sight, at least for the time being, as retail prices continue to climb in virtually all areas of the country," DeHaan said in a news release.