Here's the chart:
The surge is down to energy costs. The Italian statistical agency ISTAT said energy price inflation leapt to 73.2% from 44.5% the month before.
This is the result of the summer spike in natural gas prices, which got passed to consumers with a delay of a month or two.
Natural gas prices have slumped because of the mild autumn, but that won't be passed on to consumers for a few months.