DeKALB — Gas prices in Illinois have risen 5.9 cents per gallon in the past week, according to GasBuddy’s daily surveys of 4,378 gas stations in Illinois. Gas prices in Illinois are at an average of $3.55 per gallon, 9.7 cents higher than one month ago, and $1.36 higher than one year ago. 

The cheapest gas station in Illinois is priced at $3.14 per gallon, while the most expensive is $3.99 per gallon, an 85 cent difference.

The national price of gasoline has risen 1.8 cents per gallon in the last week, now averaging $3.41 per gallon. The national average has risen 15.1 cents per gallon in the past week, and $1.31 per gallon in the past year. 

“Last week saw oil prices briefly fall back under $80 for the first time in weeks,” said Patrick De Haan, head of petroleum analysis for GasBuddy. “We should see small declines this week in a majority of the country, thanks to the corresponding drop in wholesale gasoline prices.”