El Niño Southern Oscillation (ENSO)

Explore Our Analysis Tools

El Niño and La Niña can cause the "seasonal climate" – the cumulative effects of the weather over a season – to deviate from normal at many places around the globe. The following PSD pages can be used to analyze what happened during past El Niños and La Niñas and provide a guide to what may happen in the future.

Average Climate

Seasonal Extremes

How Events Differ