Second-warmest May globally sees record-breaking temperatures and intense heatwave in western Europe
The Copernicus Climate Change Service (C3S) has published its latest monthly Climate Bulletin, focusing on key climate trends for May 2026.
The bulletin reports that May 2026 was the second-warmest May globally, with an average surface air temperature of 15.81°C, which is 1.42°C above the estimated pre-industrial level (1850–1900). It also reports that the average temperature over Europe was 13.87°C, or 0.60°C above the 1991-2020 average for May.
Around 20 May, one of the most intense heatwaves ever observed this early in the year affected western Europe, following a rapid transition from cooler-than-average to warmer-than-average conditions. This transition is visible in this data visualisation based on C3S data. The image on the left shows the cooler-than-average temperatures observed between 11 and 19 May, whereas the image on the right shows conditions which were warmer than average between 21 and 30 May.
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