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How Gas Prices Have Changed in Great Falls in the Last Week
AAA data compiled by Stacker shows California metros topping the list with regular gas above $6.30 a gallon.
On Monday, September 28, 2026, gas prices across various markets show mixed fluctuations, with some regions reporting slight weekly increases while others see stable or declining costs.
Many regions experienced their highest fuel costs in mid-2022, with peaks reaching $5.03 in Johnstown, Pennsylvania and $5.02 in Lebanon, Pennsylvania, establishing baseline context for current price volatility.
Prices reaching $6.60 in Santa Rosa and $6.58 in San Rafael remain among the highest reported, while Harrisonburg, Virginia reports significantly lower costs at $4.15, illustrating stark regional variation.
Diesel prices remain consistently high, hitting $7.53 in some locations as of September 23, 2026, with year-over-year increases substantially outpacing regular gas cost growth for consumers.
Year-over-Year diesel increases exceed 80 percent in some markets, underscoring prolonged fuel cost pressures that continue shaping consumer spending and transportation economics long-term.