The average Illinois price for a gallon of regular unleaded is $2.27. This is eight cents cheaper than last week's average.
AAA reports the state's most expensive gas can be found in the City of Chicago, at $2.69 per gallon. By contrast, Decatur has the state's cheapest gasoline on average, at a price of $2.02 per gallon.
Rockford's average per-gallon price is $2.23. This is 6 cents cheaper than last week's average.
