Average gasoline prices in Modesto have risen 17.1 cents per gallon in the last week, averaging $4.75/gallon as of Monday, July 31, according to GasBuddy’s survey of 201 stations in Modesto. Prices in Modesto are 22.1 cents per gallon higher than a month ago and stand 63.6 cents per gallon lower than a year ago. The national average price of diesel has jumped 15.5 cents in the last week and stands at $3.99 per gallon.

According to GasBuddy price reports, the cheapest station in Modesto was priced at $4.35/gallon while the most expensive was $5.39, a difference of $1.04/gallon.

The national average price of gasoline has risen 16.5 cents per gallon in the last week, averaging $3.72/gallon. The national average is up 21.4 cents per gallon from a month ago and stands 45.6 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.

“Gas prices suddenly soared over the last week due to heat-related refinery outages that impacted some of the largest refineries in the country, at a time when summer gasoline demand peaks and as gasoline inventories slid to their lowest July level since 2015,” said Patrick De Haan, head of petroleum analysis at GasBuddy. “In addition, oil prices surged to their highest level in months, rising to over $80 per barrel due to SPR releases coming to an end and concerns over cuts in supply from Saudi Arabia and Russia, the second and third largest oil producers in the world. Motorists have seen average gasoline and diesel prices rise at the fastest pace in over a year, but the rise seen in the last week should now start slowing. However, as we get ever closer to the peak of hurricane season, any new issues could easily push the national average over $4 per gallon for the first time in 2023. Drivers may want to brace for potentially higher prices yet.”

Neighboring areas and their current gas prices include: Stockton - $4.69/gallon, up 13.5 cents per gallon from last week’s $4.56; Oakland - $4.91, up 8.7 cents per gallon from $4.83; and San Jose - $4.88/gallon, up 8.8 cents per gallon from last week’s $4.79/gallon.

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.