Gasoline prices have continued to go down in recent weeks, but that's about to change.

The price of gas will automatically increase 5.6 percent on July 1, when California's gas tax goes up from 41.7 cents to 47.3 cents per gallon.

The increase is designed to pay for road repair and road infrastructure.

This rise in the gas tax is in addition to the increase of 12 cents per gallon which was approved by the Legislature in 2017.

The new increase will be bad news for many motorists, who had been pleased that the national average price of gas had fallen for seven straight weeks, according to

San Bernardino gas prices dropped 5.4 cents per gallon in the past week, averaging $3.64/g on June 24, according to GasBuddy's daily survey of 567 stations. Gas prices in San Bernardino are 25.5 cents per gallon lower than a month ago, yet stand 4.8 cents per gallon higher than a year ago.

In Fontana, the lowest gas price on June 24 was $3.25 at Costco at 16505 Sierra Lakes Parkway, where membership is required. Other low prices were $3.27 at Foothill Gas at 17312 Foothill Boulevard and $3.29 at ARCO at 7325 Sierra Avenue.

Patrick DeHaan, head of petroleum analysis for GasBuddy, said that global events could also affect the price of gas in the near future.

"Oil prices have rebounded notably due to increasing tensions between the U.S. and Iran and attacks in the Strait of Hormuz, a key waterway which sees over 20 percent of global oil supply traversing through the waterway," DeHaan said. "Whether the upcoming and likely rebound in gasoline prices sticks for long is unknown, but if tempers continue to flare between the two countries, motorists may fall victim to the rocky relationship in the form of higher gas prices.

"In addition, trade tensions with China have now taken a back seat, but with President Trump meeting President Xi Jinping, we may see either more upward pressure on oil if signs of a truce in trade emerge, or downward pressure if the countries move further apart."

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