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Effects of El Niño and La Niña on world weather: all seasons

El Niño and La Niña affect the weather in large parts of the world. The effects depend strongly on the location and the season. We have studied the GPCC V7 analyses of precipitation over land. White areas did not have enough data. As a measure of the strength of the relationship we used the correlation coefficient with the Niño3.4 index. The square of this number gives the fraction of the variance that is explained by this aspect of El Niño and La Niña.

Precipitation
Blue colours indicate that during El Niño there was, on average, more rain than normal, red colours indicate drought during El Niño. La Niña has the opposite effect in almost all locations.
Relationship between El Niño and precipitation in January-March
Relationship between El Niño and precipitation in February-April
Relationship between El Niño and precipitation in March-May
Relationship between El Niño and precipitation in April-June
Relationship between El Niño and precipitation in May-July
Relationship between El Niño and precipitation in June-August
Relationship between El Niño and precipitation in July-September
Relationship between El Niño and precipitation in August-October
Relationship between El Niño and precipitation in September-November
Relationship between El Niño and precipitation in October-December
Relationship between El Niño and precipitation in November-January
Relationship between El Niño and precipitation in December-February

Standard seasons

Precipitation, temperature and tropical storms

Other seasons

Monthly precipitation
Seasonal precipitation
Monthly temperature
Seasonal temperature

© 2022 KNMI (results, code) / World Meteorological Organization (WMO) (design)
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