Earth Observation scientist · Brussels · Salerno
Move the cursor over the ice to see the same glacier on 6 September 2016 inside the circle. Adamello Glacier, Italy, 27 September 2026, Sentinel-2 in my short-wave infrared recipe, in which ice is cyan and meadows are green.








Monthly 2 m temperature anomaly against 1991–2020, from ERA5 at 0.25° over land only, and from ERA5-Land at 0.1° for Malta, with the method of the C3S bulletins applied within each country's border. My calculation, not an official figure, computed on 13 September 2026. Data: ERA5, Copernicus Climate Change Service at ECMWF.
Each ring is one year of daily global 2 m temperature against the 1991–2020 average: the angle gives the day of the year, and the radius gives the anomaly. The 32 grey rings, from 1991 to 2022, form a swarm; since 2023, 66% of the days have been warmer than the same day in every year of the swarm.
Daily global mean 2 m temperature anomaly against 1991–2020, from ERA5 in the Climate Pulse of the Copernicus Climate Change Service, updated every day, data to 26 September 2026. My drawing of the official series; the latest days are preliminary.














From my own analyses of Copernicus data.
All the measures →
Nine of the ten warmest European summers on record came in 2010 or later. The summer of 2026 was the third warmest, and nearly half of its heat came in June.

Slovakia, Czechia, France, and Austria set their highest summer peak since 1990. Further south, the heat lasted longer, and between 28 and 31 July, 12 of the 22 countries entered their longest heatwave.

Counted in people, the summer of 2026 affected almost every resident of the European Union, and it was most unusual where heat is least familiar.