WASHINGTON (AP) — Prices for U.S. consumers rose last month but at the slowest pace since February, a sign that Americans may gain some relief after four months of sharp increases that have imposed a financial burden on the nation's households.

Wednesday's report from the Labor Department showed that consumer prices jumped 0.5% from June to July, down from the previous monthly increase of 0.9%. They have increased a substantial 5.4% compared with a year earlier.

Excluding volatile energy and food prices, so-called core inflation rose 4.3% in the past year, down slightly from 4.5% in June — the fastest pace since 1991.

Americans continue to face higher costs, with the year-over-year inflation rate matching June's increase as the largest annual gain since 2008. At the same time, some recent drivers of the inflation surge slowed last month. The price of used cars, which had soared over the past three months, ticked up just 0.2% in July. Airline fares, which have been spiking, actually declined 0.1% in July.

"We believe June marked the peak in the annual rate of inflation," said Kathy Bostjancic, an economist at Oxford Economics. "That said, price increases stemming from the reopening of the economy and ongoing supply chain bottlenecks will keep the rate of inflation elevated."

Rising inflation has emerged as the Achilles' heel of the economic recovery, erasing much of the benefit to workers from higher pay and heightening pressure on the Federal Reserve's policymakers under Chair Jerome Powell, who face a mandate to maintain stable prices.

Inflation is also threatening to become a political liability for President Joe Biden, whom Republicans in Congress have blamed for contributing to accelerating inflation from having pushed through a $1.9 trillion financial aid package last spring that included stimulus checks to most households and federal supplemental unemployment aid. Further trillions in spending, backed by Biden and congressional Democrats, will be considered by Congress in the coming weeks.

In response, Powell and the White House have said they believe that the pickup in inflation, which well exceeds the Fed's 2% annual target, will prove temporary because it stems mainly from supply shortages resulting from the sudden shutdown — and swift reopening — of a $20 trillion economy.

Most economists agree that the primary drivers of higher prices have been categories of goods and services that were most disrupted by the pandemic — from new and used vehicles to hotel rooms, airline tickets and building materials.

But other inflationary trends could prove more long-lasting. Rents, for example, are rising again in many big cities after having dropped during the pandemic. Home prices have rocketed up. And workers, particularly in the restaurant and retail industries, are receiving substantial pay gains as businesses struggle to fill jobs.

Some companies are still raising prices to offset higher parts and labor costs. The burger chain Shake Shack plans to raise its prices by 3% to 3.5% in the final three months of the year, executives said on an investor conference call.

Unilever, the maker of Dove soap and Ben and Jerry's ice cream, has said it will raise some prices to offset higher raw materials costs. And Yum Brands, which owns KFC and Taco Bell, said late last month that its franchisees have implemented "moderate" price increases.