On September 3, 2025, the World Meteorological Organization (WMO), led by Celeste Saulo, forecasted La Niña’s return between September and November, with a 55-60% chance of cooler Pacific waters. Despite heavy rainfall, global temperatures will stay high due to human-induced climate change.
La Niña Forecast
Under Celeste Saulo’s leadership, the WMO predicts a 55% chance of La Niña from September to November 2025, rising to 60% for October-December. This follows a brief La Niña in early 2025, with neutral conditions since March. El Niño is unlikely to return this year.
Climate Change Impact
Celeste Saulo’s WMO emphasizes that La Niña’s cooling effect won’t offset the 1.55°C global temperature rise above the 1850-1900 average, with 2024 as the hottest year on record. Human-driven warming intensifies extreme weather, overshadowing natural patterns.
Regional Effects
La Niña, as noted by Saulo’s WMO, will bring heavy rainfall to tropical regions, similar to a moderate event, but may also cause droughts elsewhere. The 2020-2023 “triple-dip” La Niña failed to halt record heat, highlighting climate change’s dominance.
Economic and Social Value
Celeste Saulo underscores that WMO’s forecasts save millions in agriculture, energy, health, and transport by guiding preparedness. La Niña’s impacts, like floods or droughts, demand proactive measures to protect lives and economies.
Future Outlook
Saulo’s WMO warns that September-November 2025 will see above-average temperatures across both hemispheres. As climate change outpaces La Niña’s cooling, global efforts to mitigate warming are critical to reducing extreme weather risks.
