Paris hit about 42.6 C during the 2019 heatwave, which was the city’s record at the time. In the broader France heatwave coverage from 2026, parts of Europe reached around 40 C , while France’s national average thermal indicator was reported near 29.8 C.

Quick note

If you meant a different Paris heatwave, the answer changes by year:

  • 2019 Paris heatwave: 42.6 C.
  • 2026 France heatwave context: Paris-region reporting was tied to a much wider event, with parts of Europe around 40 C and France’s national indicator near 29.8 C.

TL;DR: Paris has reached 42.6 C in a major heatwave, but the exact number depends on which event you mean.