In this April 16, 2021, file photo, a member of the wait staff works between tables at Four Corners restaurant as people dine outdoors in Chapel Hill, North Carolina. Credit: Gerry Broome / AP

WASHINGTON — 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 percent from June to July, down from the previous monthly increase of 0.9 percent. They have increased a substantial 5.4 percent compared with a year earlier.

Excluding volatile oil and gas prices, so-called core inflation rose 4.3 percent in the past year, down from 4.5 percent in June.

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, are poised to be approved 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 percent 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 percent to 3.5 percent 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.

Story by Christopher Rugaber.