According to the WMO's most recent forecasts, although 'La Niña' has a temporary cooling influence on global average temperatures, many regions are expected to remain warmer than normal.

According to the WMO, temperatures will be above normal in much of the Northern Hemisphere and in extensive areas of the Southern Hemisphere between December 2025 and February 2026

Rainfall forecasts "resemble the conditions normally observed during a weak 'La Niña' phenomenon," the organization points out.

By definition, the 'La Niña' climate phenomenon corresponds to the periodic cooling of sea surface temperatures in the Pacific Ocean, associated with changes in tropical atmospheric circulation, including changes in wind patterns, pressure, and precipitation.