El Niño

What is El Niño?

El Niño is a warming of the central to eastern tropical Pacific that occurs, on average, every two to seven years. During an El Niño event, sea surface temperatures across the Pacific can warm by 1–3°F or more for anything between a few months to a year or two. El Niño impacts weather systems around the globe so that some places receive more rain while others receive none at all, more extremes becoming the norm. More>>


At a Glance

In Depth