La Niña 1964-1965
La Niña 1964-1965 lasted about 11 months, from Apr–Jun 1964 to Dec–Feb 1965. The Oceanic Niño Index peaked at -0.8 °C in SON 1964, a weak La Niña, ranked #18 of 20 since 1950.
StartAMJ 1964Apr–Jun
EndDJF 1965Dec–Feb
Duration11 months9 seasons
Peak ONI-0.8 °CSON 1964
Average ONI-0.69 °Cduring the episode
StrengthWeak#18 / 20
ONI before, during and after La Niña 1964-1965
Season by season
| Season | Year | ONI | Niño 3.4 temp. |
|---|---|---|---|
| AMJ Apr–Jun | 1964 | -0.6 °C | 26.80 °C |
| MJJ May–Jul | 1964 | -0.7 °C | 26.53 °C |
| JJA Jun–Aug | 1964 | -0.7 °C | 26.19 °C |
| JAS Jul–Sep | 1964 | -0.7 °C | 25.82 °C |
| ASO Aug–Oct | 1964 | -0.7 °C | 25.60 °C |
| SON Sep–Nov | 1964 | -0.8 °C | 25.44 °C |
| OND Oct–Dec | 1964 | -0.8 °C | 25.41 °C |
| NDJ Nov–Jan | 1964 | -0.8 °C | 25.45 °C |
| DJF Dec–Feb | 1965 | -0.5 °C | 25.80 °C |
Compare with other episodes
← La Niña 1955-1956La Niña 1970-1972 →El Niño 1963-1964El Niño 1965-1966El Niño 2026 (current)
Frequently asked questions
When did La Niña 1964-1965 start and end?
It started in AMJ 1964 and ended in DJF 1965, about 11 months.
How strong was La Niña 1964-1965?
Its peak ONI was -0.8 °C (SON 1964), classified as weak. It ranks #18 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.