WMO Reports Possible Return of La Niña Starting in September

The World Meteorological Organization (WMO) announced that a return of La Niña could begin influencing global weather patterns as early as September.

Published on September 3, 2025

La Nina
Planet earth split in two showing two extreme outcomes of climate change management.

The World Meteorological Organization (WMO) announced that a return of La Niña could begin influencing global weather patterns as early as September. While the phenomenon is typically associated with cooler-than-average sea surface temperatures in the central and eastern Pacific Ocean, the WMO noted that overall global temperatures are still expected to remain above average in many regions.

What La Niña Means

La Niña is characterized by a cooling of Pacific Ocean waters that can trigger shifts in worldwide climate conditions. This pattern is known to increase the likelihood of extreme events such as flooding and droughts, with direct consequences for agriculture and food production.

Current Conditions and Forecasts

Since March, the equatorial Pacific has experienced neutral conditions. However, forecasts now suggest that a transition to La Niña is increasingly possible. According to the WMO, there is a 55% probability that sea surface temperatures in the Pacific will reach La Niña levels between September and November.

Potential Impacts

The WMO emphasized that accurate seasonal forecasts can have significant benefits. By anticipating weather changes tied to La Niña, sectors such as agriculture, energy, health, and transport can take proactive measures. This preparation, the organization stated, can lead to millions of dollars in economic savings and help protect thousands of lives.

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