Gas prices have dropped 10.1¢ over the past week in Montana.
Gasbuddy.com reports the average price for a gallon of gas is $2.85 as of Monday, Dec. 15, 2025.
Gas prices in Montana are 13.9¢ per gallon lower than a month ago and stand 8.3¢ per gallon higher than a year ago.
The national average price fell 4.5¢ over the past week and stands at $2.85 per gallon as of Monday.
Nationally, gas prices are 22.0¢ per gallon lower than a month ago and 12.6¢ lower than a year ago.
The cheapest gas in Montana was $2.60 per gallon on Sunday, while the most expensive was $3.19.
