Global warming: 2025 will probably be the second warmest year ever recorded

The Copernicus service has released data for the first eleven months of 2025: global warming is set to come close to last year’s record.

2025 will most likely be the second warmest year ever recorded. The measurements carried out by the European Copernicus monitoring service have become a worrying routine. For years now, through its work, the scientific results has been reminding us how global warming and its effects are already part of our daily lives.

Global average temperature is 1.48 degrees above the pre-industrial level

According to a statement released on Tuesday 9 December, the current year could match 2023: “The global average temperature for the period from January to November 2025,” Copernicus explained, “was 0.6 degrees Celsius above the 1991–2020 average, and 1.48 degrees above the pre-industrial period”. That is, before humanity (and especially the wealthiest part of the planet) began burning coal, oil and gas to fuel production.

Clima, l'aumento della temperatura media globale negli ultimi anni
Climate: the rise in global average temperature over recent decades © Copernicus

We are therefore continuing to dangerously brush up against the 1.5 degrees Celsius threshold, the more ambitious target within the 1.5–2 degrees range set by the 2015 Paris Climate Agreement. Of course, to say that global warming has officially reached and exceeded the lower limit of that range, global average temperatures would need to remain stably above 1.5 degrees.

The 2023–2025 period could be the first to exceed 1.5 degrees Celsius overall

But the trend is as clear as it is alarming. If the figures are confirmed, the 2023–2025 period could be the first to have exceeded the threshold overall. The hope is that this will prove to be a temporary overshoot: for that to happen, however, greenhouse gas emissions must be cut immediately and drastically. Above all, this would require abandoning the continued burning of fossil fuels—a solution on which the world appeared deeply divided at the latest United Nations climate conference, Cop30 in Belém.

For the definitive data for 2025, it will be necessary to wait for the December figures. It is unlikely that the record for the hottest twelve-month period ever, set in 2024, will be broken, but it is equally unlikely that temperatures will fall far from that historic peak.

In November, numerous extreme weather events and heavy human losses

With all the resulting impacts and consequences in terms of climate crisis. Copernicus itself recalls that just last November was marked by “numerous extreme weather events, particularly tropical cyclones in Southeast Asia, which caused large-scale catastrophic flooding and resulted in serious loss of life”.

L'andamento mensile della temperatura media globale clima
Monthly global average temperature trend between 2023 and 2025 © Copernicus

November was in fact the third warmest on record, with an average temperature over land and ocean surfaces of 14.02 degrees—0.65 degrees above the 1991–2020 average. In particular, above-average values compared with recent decades were recorded almost everywhere in the world, with peaks in northern Canada, the Arctic Ocean and across Antarctica.

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