The CPI is predicted to climb 0.2% for the month, compared with a 0.1% gain in August and a flat reading in July. On an annual basis, headline CPI inflation is projected to moderate slightly to 8.1% in September, down from 8.3% in August as energy prices ease from their highs. Core inflation is projected to have accelerated to a 6.5% annual rate, up from 6.3% in August.