Consumer prices likely rose 2.6% last month from a year ago, with a monthly increase of 0.3%, the largest since January.
Worsening inflation poses a political challenge for President Trump, who promised to lower costs, and could impact the Federal Reserve's interest rate decisions.
Excluding food and energy, inflation is forecasted to have risen 3% in June from a year earlier.
Although tariffs imposed by Trump have not significantly raised inflation yet, some companies are increasing prices in response, while others are waiting to assess trade deals before raising prices.