The average Illinois price for a gallon of regular unleaded is $2.49. That's one cent more expensive than last week.
AAA reports the most expensive gas is found in the City of Chicago, at $2.84 per gallon. In contrast, Decatur has the state's cheapest gas, at $2.21 per gallon.
Rockford's average price is $2.36 per gallon. That's three cents cheaper than last week's average.