Summer heat will remain across much of France on Sunday, except for some local cool spots. Weather services expect the polar jet stream to wave overhead. After that shift, temperatures could become noticeably cooler, with the timing of cooler air varying by area.
Regional forecasts keep pointing to more warm weather in parts of the south. Certain regions will hold on to the warmth, while others may see the cooler air arrive sooner. The exact change varies by place.