Average gasoline prices in Modesto have risen 6.0 cents per gallon in the last week, averaging $4.97/gallon on Monday, Aug. 21, according to GasBuddy’s survey of 201 stations in Modesto. Prices in Modesto are 37.9 cents per gallon higher than a month ago and stand 12.3 cents per gallon lower than a year ago. The national average price of diesel has risen 2.1 cents in the last week and stands at $4.29 per gallon.

According to GasBuddy price reports, the cheapest station in Modesto was priced at $4.65/gallon while the most expensive was $5.59, a difference of 94 cents per gallon. The lowest price in the state was $4.29 while the highest was $6.97, a difference of $2.68/gallon.

The national average price of gasoline is unchanged in the last week, averaging $3.82/gallon as of Aug. 21. The national average is up 26.0 cents per gallon from a month ago and stands 4.5 cents per gallon lower 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 Modesto and the national average going back 10 years show the highest price in Modesto at $5.09 per gallon on Aug. 21, 2022 and the lowest on Aug. 21, 2016 when it was $2.44 per gallon. The highest national average in the last 10 years was $3.86 on Aug. 21, 2022 and the lowest was $2.16 per gallon, on Aug. 21, 2016.

Neighboring areas and their current gas prices include: Stockton - $4.99/gallon, up 10.0 cents per gallon from last week’s $4.89; Oakland - $5.16, up 7.4 cents per gallon from $5.09; and San Jose - $5.15, up 7.7 cents per gallon from last week’s $5.08/gallon.

“The national average price of gasoline eked out a small decline over the last week, with some states seeing a drop of 5 to 10 cents per gallon, while new issues in some states, like Arizona, have caused prices to jump notably in others,” said Patrick De Haan, head of petroleum analysis at GasBuddy. “With California getting a deluge of water from Tropical Storm Hilary, some level of refinery problems that could impact gasoline prices could arise, and with eyes on a more active Atlantic, the next few weeks will bring additional volatility to what motorists can expect at the pump.”

GasBuddy is the authoritative voice for gas prices and the only source for station-level data. GasBuddy’s survey updates 288 times every day from the most diverse list of sources covering nearly 150,000 stations nationwide, the most comprehensive and up-to-date in the country.