Extreme warmth will also continue over parts of France, Benelux, Germany, and northern Balkans.
By Wednesday, western Europe will cool down as an Atlantic air mass comes closer into the southwest part of the European continent.
Temperatures will likely return into normals over the UK and Ireland by mid-week next week.
In its long-range forecast for Monday, September 14 to Wednesday, September 23, the Met Office forecast “settled” conditions.
The UK’s national weather forecaster wrote: “The start of the period is likely to bring a change to the weather seen in recent weeks, with conditions expected to become more settled in the upcoming days.