Heat Dome Update: Europe Braces for Record-Breaking Late May Heatwave

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Europe is facing a dramatic synoptic turnaround sweeping across the continent, driven by a powerful upper-level subtropical ridge building northward from Africa. A classic, highly anomalous and powerful Heat Dome has parked over Western and Central Europe .

This atmospheric block acts as a physical lid, trapping a subsiding air mass beneath it. The intense solar radiation combined with compression forces the air, intensifying heat towards the surface.

For late May, this is a historic, record-shattering heatwave . An extraordinary thermodynamic plume sends a massive core of extreme warmth over Spain, Portugal, Ireland, the UK, France, and Germany. Temperatures are soaring by 12-16 °C above long-term climatological norms .

The strongest Heat Dome so far in 2026 is delivering mid-summer heat to millions of people well ahead of schedule. It is also well visible on the satellites, as a large blocking with drier air masses is gradually expanding north.

Over the past weekend, record-breaking temperatures were already being recorded across parts of Western Europe. Weather stations recorded the UK’s hottest May day in nearly 80 years, with London hitting 32.3 °C.

Meanwhile, the southern and southwestern regions of Portugal, Spain, and France are experiencing extreme daytime highs of 35°C to 38°C. Italy recorded 31-34 °C on Sunday; it was 30-33 °C in Germany, around the Alps, and in parts of the Balkans.

Here is a chart for Sunday, May 24th. Numerous weather stations across Germany, France, Benelux, Ireland, and the UK have already broken their daily high-temperature records.

The pink dots represent the highest temperature these stations have ever recorded on May 24th; those were shattered today.

Air mass will be even hotter in the coming days for many countries, as the Heat Dome aloft intensifies further. Because this pattern restricts vertical mixing and cloud cover, maximum and minimum temperatures alike will challenge historical monthly records across hundreds of stations in Western Europe.

Here are the Top 10 all-time Highs for countries in Western Europe for the month of May:

The Highest May temperatures recorded in England and the UK:

32.8 °C in Camden Square, Regent’s Park, London, and Tunbridge Wells, Kent on 29th May, 1944

30.6 °C in Wisley, Surrey on 22nd May, 1922

30.5 °C in Frittenden, Kent on 23rd May, 2026

29.9 °C in St James’s Park, London on 16th May, 1969

29.7 °C in Lossiemouth, Scotland on 25th May, 2012

29.4 °C in Northolt, London on 25th May, 1978

29.3 °C in Kew Gardens, London on 1st May, 2025

29.2 °C in Heathrow, London, in May 1992

These are the Highest May Temperatures across France:

36.2 °C in Dax on 21st May, 2022

35.7 °C in Biarritz on 21st May, 2022

35.4 °C in Mont-de-Marsan on 21st May, 2022

35.2 °C in the Toulouse area in May, 2022

34.9 °C in Albi on 18th May, 2022

34.7 °C in Montélimar on 18th May, 2022

34.5 °C in the Bordeaux region in May, 2022

34.3 °C in Agen in May, 2022

33.9 °C in Tours on 30th May, 2025

33.4 °C in the Nantes region in May, 2022

These are the Highest May Temperatures across Germany:

39.2 °C in the Saarland region in May 1947

38.6 °C in the Karlsruhe area in May, 2005

37.8 °C in the Frankfurt region in May, 2005

37.2 °C in Mannheim in May, 2005

36.9 °C in the Berlin region in May, 1892

36.7 °C in the Cologne region in May, 2005

36.5 °C in the Stuttgart area in May, 2005

36.1 °C in the Bavaria region in May, 2003

35.8 °C in the Leipzig region in May, 2017

35.5 °C in Berlin on 28th May, 1892

These are the Highest May Temperatures across Benelux:

38.2 °C in Belgium, Begijnendijk in May, 1947

38.0 °C in Luxembourg, Remich region in May, 1947

37.8 °C in the Netherlands, Eindhoven region in May 1947

37.1 °C in Belgium, Brussels region in May, 2005

36.9 °C in the Netherlands, Maastricht area in May 2005

36.7 °C in Luxembourg, Luxembourg Airport in May, 2005

36.5 °C in Belgium, Liège region in May, 2022

36.3 °C in the Netherlands, Limburg in May, 2022

35.9 °C in Luxembourg, Steinsel in May, 2022

35.7 °C in Belgium, Antwerp region in May, 1922

This final week of May 2026, the temperatures across Western Europe will be around 12-16 °C above the long-term average, which is staggeringly high for late May.

The meteogram below for Paris, France, represents how anomalous the heatwave will be.

Before we dig into the details of this historic, unusually early-season heatwave in Europe, let’s examine the main driver behind these extensive warm waves and heatwaves in general.

What is a Heat Dome?

When significant, record-breaking heatwaves occurred in Europe, the United States, and Canada in the past, the Heat Dome was a...