In June 2018, the Consumer Prices Index (CPI) was stable over a month, after an acceleration in May (+0.4% after +0.2% in April). This stability resulted from a rise in energy prices, less markedly than in May (+0.9% after +2.0%), offset by a downturn in food prices (−0.2% after 0.9%). "Manufactured product" prices were unchanged after a 0.3% increase in the previous month. Services prices were also stable after +0.1% in May.

Seasonally adjusted, consumer prices were stable after a slight acceleration to +0.3% in May.

Year on year, consumer prices rose by 2.0%, as in the previous month. This stability in inflation reflected two opposing trends: a sharp year-on-year acceleration in energy prices and, to a lesser extent, in these of food and tobacco, while those of services slowed down. "Manufactured product" prices fell at the same pace as in the previous month.