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12h ago

2025 Confirmed as Third-Warmest Year as 2023–2025 Average Tops 1.5°C

Scientists say persistent greenhouse gases are pushing the world toward an imminent overshoot of the Paris 1.5°C goal.

FILE - A boy cools himself in a fountain on a hot day in Moscow, Russia, July 9, 2025. (AP Photo/Pavel Bednyakov, File)
FILE - Tourists use umbrellas to shelter against the sun outside Hagia Sophia mosque during a hot summer day in Istanbul, Aug. 12, 2025. (AP Photo/Francisco Seco, File)
image: ©Petmal | iStock
FILE - Tourists use an umbrella as they walk an alley of the Trocadero gardens during a hot day Monday, Aug. 11, 2025, in Paris. (AP Photo/Aurelien Morissard, File)

Overview

  • EU and independent datasets place 2025 at 1.47°C above pre‑industrial levels, with 2024 ranked hottest and 2023 second, making the past 11 years the warmest on record.
  • The period 2023–2025 is the first three-year span averaging above 1.5°C, and ECMWF analysts project the threshold could be consistently exceeded by around 2029.
  • Despite neutral to weak La Niña conditions, 2025 was the warmest La Niña year recorded, supported by historically high sea‑surface temperatures.
  • Polar indicators worsened, with Antarctica logging its hottest year, the Arctic its second hottest, and combined sea ice hitting record lows.
  • Attribution studies link 2025 extremes to warming, including record wildfire emissions in Europe, Hurricane Melissa in the Caribbean, and deadly Pakistan monsoon floods, as political pushback grows with U.S. withdrawals from UN climate bodies including the IPCC.