The average Illinois price for a gallon of regular unleaded is $2.30. That's four cents more expensive than last year's average, according to AAA.
The most expensive gas is in the City of Chicago, at $2.65 per gallon. By contrast, the cheapest gas can be found in Springfield and Decatur, at $2.14 per gallon.
Rockford's average price is $2.22 per gallon. This is ten cents higher than last week's average.