The average price of regular gasoline in the U.S. has fallen 2 cents a gallon during the past two weeks.
Industry analyst Trilby Lundberg said Sunday a gallon of regular now costs $3.29 on average. Gas is 30 cents a gallon cheaper than this time last year
Lundberg says the price has dropped more than a nickel per gallon in the past month, but it's unlikely to fall further unless crude oil prices plunge.
(Read more: All 50 states have gas prices above $3 per gallon)