UN Warns Next Five Years Will Shatter Temperature Records

The United Nations’ World Meteorological Organization (WMO) has issued one of its starkest warnings yet, projecting a 75% probability that average global temperatures between 2026 and 2030 will exceed 1.5°C above pre-industrial levels — the critical threshold established by the Paris Agreement. According to the WMO’s Global Annual-to-Decadal Climate Update, produced in collaboration with the UK Met Office, there is a 91% chance that at least one individual year in this period will temporarily breach the 1.5°C limit, and an 86% likelihood that a single year will surpass 2024 as the hottest year on record.

The Numbers Behind the Warning

Annual global mean near-surface temperatures during 2026–2030 are predicted to range between 1.3°C and 1.9°C above the 1850-1900 baseline. This follows 2024, which was the hottest year ever recorded at approximately 1.55°C above pre-industrial levels. The report is based on averaging roughly 200 runs of computer simulations using 13 different climate models from institutions worldwide.

“It’s important to note that (1.5) is not kind of a cliff edge that we’re going to fall off,” said Melissa Seabrook, a report co-author and climate scientist at the UK Met Office, as reported by the Associated Press. “Every kind of 0.1 of a degree has more and more severe impact.”

What 1.5°C Means — and Doesn’t Mean

The 1.5°C target, enshrined in the 2015 Paris Climate Agreement, refers to long-term warming sustained over approximately 20 years — not individual years. Temporary exceedances, like the one recorded in 2024, do not represent a formal breach of the agreement. However, the WMO’s projection that the entire five-year average may exceed this level signals that the world is approaching the long-term warming limit far sooner than anticipated.

Scientists estimate current long-term warming stands at around 1.4°C. If the next five years average more than 1.5°C, that would represent a warming rate of approximately 0.25°C per decade — faster than the previous rate of about 0.2°C per decade, adding evidence to the debate over whether global warming is accelerating.

The Human Cost of Rising Temperatures

Friederike Otto, a climate scientist at Imperial College London who was not involved in the report, described the consequences in stark terms, as noted by the AP: “An entire year or more above the 1.5 degree mark means a whole range of extreme weather events, probably many so hot/wet/dry that it exceeds anything we’ve experienced in the past and thus crucially, anything our city planning, agriculture etc. has anticipated. This will mean many people will lose their lives, we are in for a lot of food price shocks, and more intense wildfires.”

UN Climate Chief Simon Stiell emphasized that current mitigation efforts remain insufficient. “Despite the progress of recent years, it’s clear that global heating is still outpacing global efforts to contain it,” he said. “Whether it’s extreme heat, mega-storms, floods, massive wildfires or droughts hitting food supply and prices, every nation is already paying a huge price from this global climate crisis.”

El Niño and the Next Record-Breaking Year

The WMO projects a strong El Niño — a natural climate phenomenon characterized by warmer-than-average sea surface temperatures in the central tropical Pacific — to form by the end of 2026, with conditions expected to persist through 2027 and 2028. El Niño typically elevates global temperatures on top of the human-caused warming trend.

“There is an El Niño predicted for the end of 2026, which increases the chances of the following year, 2027, being the next record-breaking year,” said Leon Hermanson, lead author of the WMO update, as reported by the UK Met Office.

Arctic Amplification and Regional Impacts

The Arctic continues to warm at an alarming rate — approximately 3.5 times faster than the global average. The WMO projects Arctic winter temperatures over the next five years will average 2.8°C above the 1991-2020 baseline, an anomaly more than three and a half times the global mean. This accelerated warming threatens permafrost thaw, sea-ice loss, and dangerous feedback loops that could accelerate warming further.

The report also warns of drier-than-normal conditions in the Amazon basin, increasing wildfire risk and threatening the rainforest’s role as a critical carbon sink. Conversely, Africa’s Sahel region is expected to receive more rainfall than normal, which could lead to flooding in an area already vulnerable to climate shocks.

A Call for Urgent Action

The findings place renewed pressure on nations to strengthen their climate commitments ahead of COP31. UK Climate Minister Katie White captured the growing sense of urgency, stating: “When families are worrying about grandparents overheating behind closed curtains, and children are struggling to sleep through another unbearably hot night, this stops feeling like a warning about the future and starts feeling frighteningly close to home.”

Despite the grim projections, the report notes there is less than a 1% chance that any single year in the next five years will exceed 2°C above pre-industrial levels — offering a narrow but critical window for accelerated action to avert the most catastrophic outcomes.

What to Watch For

As the world approaches what scientists describe as a pivotal moment, key questions remain: Will nations use the COP31 summit to adopt more aggressive emissions targets? How will financial markets and insurance industries adapt to the increased frequency of extreme weather events? And can the international community bend the warming curve before the 1.5°C threshold becomes a permanent reality rather than a temporary breach?

The next five years, the WMO makes clear, will be a defining test of humanity’s response to the climate crisis.