El Niño and La Niña are the two opposing phases of the El Niño–Southern Oscillation, a coupled ocean–atmosphere system centered over the equatorial Pacific Ocean. Every one to three years, sea-surface temperatures in this region swing between colder-than-normal conditions, known as La Niña, and warmer-than-normal conditions, known as El Niño.
For December, ECMWF seasonal maps and independent diagnostics show a pressure anomaly with higher pressure towards northern Europe and lower pressure across central/southern Europe.
Weather in Europe in December 2025: Long-Range Forecast Read Post »
As we move toward winter 2025–26, the forecast is no longer about waiting for the cold to arrive—it’s about recognizing how the next season is already developing.
The latest meteorological data show that Winter 2025–2026 won’t be ordinary.
Winter 2025–2026 Is Coming: La Niña, a Weak Polar Vortex, and a Cold Surprise Read Post »
Based on ECMWF seasonal data, NOAA analysis, and current atmospheric trends
