La Niña 1983-1984
La Niña 1983-1984 lasted about 7 months, from Sep–Nov 1983 to Jan–Mar 1984. The Oceanic Niño Index peaked at -1.0 °C in OND 1983, a weak La Niña, ranked #14 of 20 since 1950.
StartSON 1983Sep–Nov
EndJFM 1984Jan–Mar
Duration7 months5 seasons
Peak ONI-1.0 °COND 1983
Average ONI-0.75 °Cduring the episode
StrengthWeak#14 / 20
ONI before, during and after La Niña 1983-1984
Season by season
| Season | Year | ONI | Niño 3.4 temp. |
|---|---|---|---|
| SON Sep–Nov | 1983 | -0.8 °C | 25.78 °C |
| OND Oct–Dec | 1983 | -1.0 °C | 25.56 °C |
| NDJ Nov–Jan | 1983 | -0.9 °C | 25.65 °C |
| DJF Dec–Feb | 1984 | -0.6 °C | 25.97 °C |
| JFM Jan–Mar | 1984 | -0.5 °C | 26.30 °C |
Compare with other episodes
← La Niña 1974-1976La Niña 1984-1985 →El Niño 1982-1983El Niño 2026 (current)
Frequently asked questions
When did La Niña 1983-1984 start and end?
It started in SON 1983 and ended in JFM 1984, about 7 months.
How strong was La Niña 1983-1984?
Its peak ONI was -1.0 °C (OND 1983), classified as weak. It ranks #14 among 20 La Niña episodes since 1950.
Episodes are computed from NOAA's Oceanic Niño Index (ERSSTv5) with the standard rule: five or more consecutive overlapping seasons at or beyond ±0.5 °C. Free to cite with a link to elninoforecast.com.