The average Illinois price for a gallon of regular unleaded gasoline is $2.59. This is 18 cents higher than last week's average.
AAA reports the most expensive gas can be found in the City of Chicago, at a price of $2.85 per gallon. By contrast, the cheapest gas can be found in Champaign-Urbana, at $2.42 per gallon.
Rockford's average price is $2.56 per gallon. This is 23 cents higher than last week.