Gasoline prices fell slightly for the first time in weeks, raising doubts that pump prices would rise another 10 cents to 15 cents in coming weeks to catch up with skyrocketing crude prices, as some had thought.

Oil futures, meanwhile, rose Friday on investors’ belief that supplies aren’t as plentiful as a government report at first suggested.

The national average price of a gallon of gas dropped 0.3 cent overnight to $3.109, according to AAA and the Oil Price Information Service.

In Lawrence, according to AAA’s Fuel Gauge Report, the average price was $3.005 per gallon Friday, up 0.1 cent from Thursday and up nearly 60 cents from a month earlier.

The price in Lawrence was $2.158 per gallon in town a year ago.