Gas Prices Unchanged During Week
Average gasoline prices in Montana are unchanged in the last week, averaging $3.87/g on Monday, April 20, according to GasBuddy’s survey of 615 stations in Montana. Prices in Montana are 36.5 cents per gallon higher than a month ago and stand 75.4 cents per gallon higher than a year ago. The national average price of diesel has decreased 11.7 cents compared to a week ago and stands at $5.500 per gallon.
According to GasBuddy price reports, the cheapest station in Montana was priced at $3.49/g on Sunday, April 19, while the most expensive was $4.88/g, a di rence of $1.39/g.
The national average price of gasoline has fallen 9.4 cents per gallon in the last week, averaging $3.97/g on Monday. The national average is up 3.9 cents per gallon from a month ago and stands 87.4 cents per gallon higher than a year ago, according to GasBuddy data compiled from more than 11 million weekly price reports covering over 150,000 gas stations across the country.
Historical gasoline prices in Montana and the national average going back five years: April 20, 2025: $3.12/g (U.S. Average: $3.10/g) April 20, 2024: $3.57/g (U.S. Average: $3.67/g) April 20, 2023: $3.45/g (U.S. Average: $3.68/g) April 20, 2022: $4.07/g (U.S. Average: $4.10/g) April 20, 2021: $2.76/g (U.S. Average: $2.87/g) Neighboring areas and their current gas prices: Idaho: $4.31/g, up 2.3 cents per gallon from last week’s $4.28/g.
Billings: $3.76/g, down 3.7 cents per gallon from last week’s $3.79/g.
Wyoming: $3.80/g, unchanged from last week’s $3.80/g.
“Average gasoline prices declined in 48 states over the last week, while diesel prices fell in 46 states, o ring a welcome break at pumps, with the national average price of gasoline dipping below the $4 per gallon mark over the weekend,” said Patrick De Haan, head of petroleum analysis at GasBuddy. “However, that relief may prove fleeting. Oil prices surged in Sunday night trading after Iran re-closed the Strait of Hormuz and President Trump signaled further escalation if Tehran does not come to an agreement. With global oil flows remaining at risk, renewed volatility is taking hold, and the continued back-and-forth is making any lasting resolution increasingly fragile. As a result, gasoline prices are likely to rise again in the days ahead, with diesel expected to follow if disruptions persist, and many of the states that exhibit price cycling could see increases in the next 24-48 hours.”
