La Niña 2010-2011
La Niña 2010-2011 lasted about 14 months, from May–Jul 2010 to Apr–Jun 2011. The Oceanic Niño Index peaked at -1.6 °C in OND 2010, a strong La Niña, ranked #6 of 20 since 1950.
What happened
A strong La Niña linked to the 2010-11 Queensland floods in Australia and the devastating rainy season in Colombia and Venezuela.
Impacts vary by region and event; see our country pages for the usual pattern.
ONI before, during and after La Niña 2010-2011
Season by season
| Season | Year | ONI | Niño 3.4 temp. |
|---|---|---|---|
| MJJ May–Jul | 2010 | -0.7 °C | 27.03 °C |
| JJA Jun–Aug | 2010 | -1.0 °C | 26.34 °C |
| JAS Jul–Sep | 2010 | -1.2 °C | 25.74 °C |
| ASO Aug–Oct | 2010 | -1.4 °C | 25.37 °C |
| SON Sep–Nov | 2010 | -1.5 °C | 25.21 °C |
| OND Oct–Dec | 2010 | -1.6 °C | 25.14 °C |
| NDJ Nov–Jan | 2010 | -1.5 °C | 25.14 °C |
| DJF Dec–Feb | 2011 | -1.3 °C | 25.28 °C |
| JFM Jan–Mar | 2011 | -1.1 °C | 25.72 °C |
| FMA Feb–Apr | 2011 | -0.8 °C | 26.37 °C |
| MAM Mar–May | 2011 | -0.7 °C | 26.95 °C |
| AMJ Apr–Jun | 2011 | -0.5 °C | 27.29 °C |
Compare with other episodes
← La Niña 2008-2009La Niña 2011-2012 →El Niño 2009-2010El Niño 2026 (current)
Frequently asked questions
When did La Niña 2010-2011 start and end?
It started in MJJ 2010 and ended in AMJ 2011, about 14 months.
How strong was La Niña 2010-2011?
Its peak ONI was -1.6 °C (OND 2010), classified as strong. It ranks #6 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.