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La Nina may affect weather from September, says WMO

Published by Global Banking & Finance Review

Posted on September 2, 2025

1 min read

· Last updated: January 22, 2026

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La Nina may affect weather from September, says WMO
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BERLIN (Reuters) -A return of La Nina may start to affect global weather patterns from September, the World Meteorological Organization (WMO) said on Tuesday, adding, however, that temperatures are

La Nina's Return Could Impact Global Weather Patterns Starting September

Impact of La Nina on Global Weather

BERLIN (Reuters) -A return of La Nina may start to affect global weather patterns from September, the World Meteorological Organization (WMO) said on Tuesday, adding, however, that temperatures are still likely to be above average for large parts of the world.

Understanding La Nina

The La Nina pattern involves the cooling of temperatures in the central and eastern Pacific Ocean, increasing the chance of floods and droughts, which can impact crops.

Forecasts and Economic Implications

Neutral conditions have persisted since March but may transition to La Nina conditions in the coming months, said the WMO in a statement.

Latest forecasts show a 55% likelihood of sea surface temperatures in the equatorial Pacific cooling to La Nina levels in the period from September to November, it said.

Seasonal forecasts and their impact on weather can translate into millions of dollars of economic savings for agriculture, energy, health and transport, said the WMO, adding thousands of lives can also be saved by preparing response actions.

(Reporting by Madeline Chambers, editing by Rachel More)

Key Takeaways

  • La Nina may affect global weather from September.
  • WMO forecasts a 55% chance of La Nina conditions.
  • La Nina involves cooling in the Pacific Ocean.
  • Weather changes can impact agriculture and economy.
  • Preparation can save lives and economic resources.

Frequently Asked Questions

What is La Nina?
La Nina is a weather pattern characterized by the cooling of temperatures in the central and eastern Pacific Ocean, which can increase the likelihood of floods and droughts.
What does the WMO predict about La Nina's return?
The World Meteorological Organization (WMO) predicts that La Nina may start to affect global weather patterns from September, with a 55% likelihood of sea surface temperatures cooling to La Nina levels.
How can seasonal forecasts impact the economy?
Seasonal forecasts can lead to millions of dollars in economic savings for sectors such as agriculture, energy, health, and transport, and can also help save thousands of lives.

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