El Niño 2020
2020 was an La Niña year: 3 of 12 three-month seasons had El Niño-level ONI and 4 La Niña-level. The most extreme value was -1.1 °C in OND.
Episodes in 2020
ONI month by month in 2020
| DJF | JFM | FMA | MAM | AMJ | MJJ | JJA | JAS | ASO | SON | OND | NDJ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +0.7 | +0.7 | +0.6 | +0.3 | +0.0 | -0.2 | -0.3 | -0.4 | -0.8 | -1.0 | -1.1 | -1.1 |
← 20192021 →Full ONI tableStatisticsWeekly update
Frequently asked questions
Was 2020 an El Niño year?
2020 was an La Niña year: 3 of 12 three-month seasons had El Niño-level ONI and 4 La Niña-level. The most extreme value was -1.1 °C in OND.
Which ENSO episodes affected 2020?
El Niño 2019-2020 (+0.8 °C), La Niña 2020-2021 (-1.1 °C)
Source: NOAA CPC Oceanic Niño Index (public domain).