El Niño 2017
2017 was a mostly neutral year: 0 of 12 three-month seasons had El Niño-level ONI and 2 La Niña-level. The most extreme value was -0.8 °C in NDJ.
Episodes in 2017
ONI month by month in 2017
| DJF | JFM | FMA | MAM | AMJ | MJJ | JJA | JAS | ASO | SON | OND | NDJ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| -0.1 | +0.1 | +0.3 | +0.3 | +0.3 | +0.3 | +0.1 | -0.1 | -0.2 | -0.4 | -0.6 | -0.8 |
← 20162018 →Full ONI tableStatisticsWeekly update
Frequently asked questions
Was 2017 an El Niño year?
2017 was a mostly neutral year: 0 of 12 three-month seasons had El Niño-level ONI and 2 La Niña-level. The most extreme value was -0.8 °C in NDJ.
Which ENSO episodes affected 2017?
La Niña 2017-2018 (-0.8 °C)
Source: NOAA CPC Oceanic Niño Index (public domain).