Average gasoline prices in Illinois dropped by 3.6 cents per gallon over the past week, bringing the statewide average to $2.86 per gallon. Prices are now 21 cents lower than a month ago and nearly 32 cents lower than this time last year, according to GasBuddy’s survey of 4,378 stations. GasBuddy reports the lowest-priced station in Illinois was selling gasoline at $2.28 per gallon, while the highest price reached $4.49, creating a statewide spread of $2.21 per gallon. The national average price of diesel also declined, falling 2.3 cents over the past week to $3.50 per gallon.

In Central Illinois and nearby markets, prices continue to vary. Peoria averaged $2.82 per gallon, up slightly from last week. St. Louis averaged $2.65, while Champaign came in at $2.69, both having slight declines in cost. Historical data shows Illinois gasoline prices averaged $3.18 per gallon at this time in 2025, $3.03 in 2024, $3.35 in 2023, $3.39 in 2022 and $2.35 in 2021.

Nationally, the average price of gasoline dipped 1.2 cents this last week to $2.74 per gallon. That figure is down 21 cents from a month ago and 29 cents lower than a year ago, based on more than 11 million weekly price reports covering over 150,000 stations nationwide.

GasBuddy petroleum analysts say seasonal trends continue to push prices lower across much of the country, despite some short-term increases in markets that typically experience price cycling. Analysts expect prices to reach their low point in the coming weeks before beginning a gradual seasonal increase heading toward March.

GasBuddy is a fuel savings platform providing real-time pricing data for more than 150,000 stations across North America. Learn more by heading to www.gasbuddy.com.