La Nina May Return September - October, But Even If It Does, Global Temperatures Will Remain Above Average

The cooling La Niña weather phenomenon may return between September and November, but even if it does, global temperatures are expected to be above average, the United Nations has said.

La Niña is a naturally occurring climate phenomenon that cools surface temperatures in the central and eastern equatorial Pacific Ocean. It brings changes in winds, pressure and rainfall patterns. Conditions oscillate between La Niña and its opposite, El Niño, with neutral conditions in between.

After a brief spell of weak La Niña conditions, neutral conditions have persisted since March, the UN’s World Meteorological Organization (WMO) said. “There is a 55% chance for sea surface temperatures in the equatorial Pacific to cool to La Niña levels” between September and November, it said.

“For October to December 2025, the probability of La Niña conditions slightly increases to about 60%,” the weather and climate agency added. There is little chance of El Niño developing during September to December.

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https://www.theguardian.com/environment/2025/sep/02/global-temperatures-to-remain-above-average-despite-return-of-la-nina-says-un