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Temperature and precipitation anomalies in previous El Niño events

The schematic charts below show typical anomaly patterns of surface temperature and precipitation for each season (boreal spring, summer, autumn and winter) in past El Niño events.

Boreal spring (March through May)

Boreal summer (June through August)

Boreal autumn (September through November)

Boreal winter (December through February)

More information

More schematic charts are available on the pages shown below.
Previous temperature and precipitation anomalies:

• La Niña events
• Warmer SST events in the western tropical Pacific
• Cooler SST events in the western tropical Pacific
• Warmer SST events in the tropical Indian Ocean
• Cooler SST events in the tropical Indian Ocean

The "Detailed Charts" page shows anomaly patterns of three-month-mean temperature and three-month-total precipitation fields centered on each calendar month for previous warmer/cooler SST events in each of the three tropical areas with 5°x5°-grid representation, from which the schematic charts described above were derived.

Data and analysis method details are provided on the "Data and Analysis Method" page.