NEW YORK — Gasoline prices have never been higher this time of the year.

At $3.53 a gallon, prices are already up 25 cents since Jan. 1. And experts say they could reach a record $4.25 a gallon by late April.

“You’re going to see a lot more staycations this year,” says Michael Lynch, president of Strategic Energy & Economic Research. “When the price gets anywhere near $4, you really see people react.”

The surge in gas prices follows an increase in the price of oil.

Oil around the world is priced differently. Brent crude from the North Sea is a proxy for the foreign oil that’s imported by U.S. refineries and turned into gasoline and other fuels. Its price has risen 11 percent so far this year, to around $119 a barrel, because of tensions with Iran, a cold snap in Europe and rising demand from developing nations. West Texas Intermediate, used to price oil produced in the U.S., is up 4 percent to around $103 a barrel. That’s 19 percent higher than a year earlier.

Higher gas prices could hurt consumer spending and curtail the recent improvement in the U.S. economy.

A 25-cent jump in gasoline prices, if sustained over a year, would cost the economy about $35 billion. That’s only 0.2 percent of the total U.S. economy, but economists say it’s a meaningful amount, especially at a time when growth is only so-so.