A. 0.5°C to 1.0°C
B. 1.2°C to 1.9°C
C. 2.5°C to 3.0°C
D. 0.1°C to 0.4°C
The World Meteorological Organization (WMO) has warned that the global average temperature for the period 2025–2029 is likely to be between 1.2 °C and 1.9 °C warmer than the 1850–1900 pre‑industrial average. This forecast comes from the WMO’s Global Annual to Decadal Climate Update, which predicts continued high global temperatures driven by long‑term climate change and variability, with a strong chance that at least one year in this period will be hotter than any previously recorded year.
This projected temperature range underscores the urgency of global climate action, as it suggests that average temperatures could frequently exceed key thresholds like the 1.5 °C limit agreed under the Paris Agreement — even if temporarily — thereby increasing the likelihood of more frequent and intense climate impacts around the world.