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UK Heat Dome: Summer's Last Roar?
20 Sep
Summary
- Temperatures could reach 24C, offering a final summer sun.
- A 'heat dome' from North Africa is expected to bring warmth.
- Warm weather may be cut short by a colder front from the west.
As of Sunday, September 20, 2026, the UK can anticipate a late summer heatwave, with temperatures potentially soaring to 24C in some areas. This welcome warmth is being driven by a 'heat dome' moving from North Africa.
Starting Sunday, pleasant and sunny conditions are expected, with highs above 20C in the southeast, rising to the high teens elsewhere. By Tuesday, parts of London and the southeast could see peaks of 24C with sunshine dominating the south and midlands. This influx of warmth is due to low pressure over the Atlantic dragging warmer air from the continent.
However, this summery interlude might be brief. Forecasters indicate that a colder front approaching from the west could disrupt the warm spell. Following this, the weather is predicted to become more changeable, with a mix of rain, showers, and shorter periods of settled weather, bringing temperatures back to near normal.
