Why in news?
The World Meteorological Organization (WMO) released its Global Annual‑to‑Decadal Climate Update in May 2026. The report warns that there is a very high probability of global temperatures temporarily exceeding 1.5 °C above pre‑industrial levels in at least one year between 2026 and 2030.
Background
The 2015 Paris Agreement aims to keep the long‑term global temperature rise well below 2 °C and pursue efforts to limit it to 1.5 °C relative to the 1850–1900 baseline. However, natural climate variability, including strong El Niño events, can cause short‑term spikes above this threshold. Temporary exceedances do not imply that the Paris goal has been breached, but they foreshadow the increasing difficulty of staying within the limit without rapid emissions reductions.
Main findings of the 2026 update
- Temperature predictions: The report projects that the average global surface temperature in 2026–2030 will be between 1.3 °C and 1.9 °C above the 1850–1900 mean. There is a 91 percent chance that at least one year in this period will exceed the 1.5 °C threshold and a 75 percent chance that the five‑year mean will do so.
- Regional patterns: The Arctic is expected to warm more than three and a half times faster than the global average, with temperatures in the region predicted to be about 2.8 °C higher than the 1991–2020 mean. High‑latitude regions may see wetter conditions, while parts of the subtropics and mid‑latitudes could experience drier weather.
- El Niño impacts: Strong El Niño conditions are anticipated in 2027 and 2028, which could boost global temperatures and influence rainfall patterns. El Niño events typically bring warmer, drier conditions to India and southern Africa and wetter weather to parts of South America.
- Long‑term implications: The WMO emphasises that temporary exceedances of 1.5 °C should not be confused with the long‑term target. Nonetheless, such episodes will become more frequent as greenhouse‑gas concentrations rise. Rapid emission cuts and adaptation measures are essential to avoid severe impacts on food security, water resources and ecosystems.
Conclusion
The latest climate outlook underscores the urgency of global climate action. Even a short‑lived breach of the 1.5 °C mark could exacerbate extreme weather, sea‑level rise and ecological disruption. Policymakers must accelerate mitigation efforts and plan for adaptation to safeguard vulnerable communities and ecosystems.