Gas prices in Illinois average a dollar per gallon less than they did a year ago at this time.

AAA Chicago's “Fuel Gauge Survey” shows an average price in the state of $2.60 for a gallon of unleaded fuel. The auto club's Beth Mosher credits supply-and-demand in the driver's favor.

“Prices are low, and have been low, pretty much throughout the summer, comparatively against summers past, largely because supply is so ample right now and has been for nearly a year,” Mosher says.

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Illinois' $2.60 is a penny more than the national average and 32 cents below the July 2015 average. Downstate prices range from Decatur's $2.17 to East St Louis' $2.67. The city of Chicago is still $2.99, and the “Chicago metro” (Cook and collar counties) average is $2.76.

Mosher says gas stations profit more from snacks and drinks sold inside the store than they do from the gasoline.


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