The latest Lundberg Survey of fuel prices shows the average price for a gallon of regular gas in Chicago is at $4.11.
San Francisco is No. 1 at $4.13 a gallon.
The national average is $3.76.
That's a 19-cent jump over the past three weeks.
Analyst Trilby Lundberg says that the national average would have been even higher had refiners and retailers passed along rising crude oil prices to customers.
Lundberg notes that demand is dropping as prices rise.