The average state price of a gallon of regular unleaded gas is $2.18. That's nine cents cheaper than last week's average, according to AAA.
The most expensive gas in the state can be found in Chicago, at $2.61 per gallon. By contrast, the cheapest per-gallon price is in Danville, at $1.91.
Rockford's average price is $2.11 per gallon.
