El Niño 2011
2011 was an La Niña year: 0 of 12 three-month seasons had El Niño-level ONI and 10 La Niña-level. The most extreme value was -1.3 °C in DJF.
Episodes in 2011
ONI month by month in 2011
| DJF | JFM | FMA | MAM | AMJ | MJJ | JJA | JAS | ASO | SON | OND | NDJ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| -1.3 | -1.1 | -0.8 | -0.7 | -0.5 | -0.3 | -0.4 | -0.5 | -0.8 | -0.9 | -1.0 | -0.9 |
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Frequently asked questions
Was 2011 an El Niño year?
2011 was an La Niña year: 0 of 12 three-month seasons had El Niño-level ONI and 10 La Niña-level. The most extreme value was -1.3 °C in DJF.
Which ENSO episodes affected 2011?
La Niña 2010-2011 (-1.6 °C), La Niña 2011-2012 (-1.0 °C)
Source: NOAA CPC Oceanic Niño Index (public domain).