Average gasoline prices across Illinois climbed again over the past week, rising nearly 7 cents per gallon to an average of $2.94, according to a new survey of more than 4,300 stations conducted by GasBuddy. While prices are slightly higher than a month ago, drivers are still paying nearly 30 cents less per gallon than they were this time last year.

GasBuddy data shows a wide range in prices across the state. The lowest reported price in Illinois on Sunday was $2.34 per gallon, while the highest reached $4.29, creating a nearly $2 difference depending on location. Nationally, the average price of gasoline increased by 7.5 cents over the past week to $2.84 per gallon. That figure is slightly higher than one month ago but remains nearly 24 cents lower than a year ago, based on millions of weekly price reports from stations nationwide.

In central Illinois, prices showed mixed movement. Peoria averaged $2.83 per gallon, down slightly from last week. Champaign prices fell more sharply to $2.78, while St. Louis saw a notable jump, rising to $2.70 per gallon. Diesel prices also moved higher, increasing 7.8 cents over the past week to a national average of $3.543 per gallon. Rising oil prices, tighter global supply conditions and winter weather impacts are contributing to upward pressure at the pump.

Looking back, today’s prices remain well below levels seen in recent years. On the same date in 2023, Illinois drivers were paying an average of $3.66 per gallon, and prices exceeded $3.50 in both 2022 and 2025.

GasBuddy reports that rising crude oil prices, ongoing geopolitical tensions affecting global supply, and cold-weather disruptions at refineries are all factors influencing fuel costs. Increased demand for heating oil during winter conditions has also contributed to higher diesel prices, which can ripple into gasoline markets.

GasBuddy is a fuel savings platform tracking real-time prices at more than 150,000 stations across North America.