El Niño/La Niña Update (December 2009) Publication 01 December 2009 Adobe Stock / Microgen An El Niño event, which started in June 2009, is well established across the tropical Pacific. El Niño conditions are very likely to continue at least through the remainder of 2009 and into the first quarter of 2010. Some climate patterns typical of El Niño have been observed over the last several months. View Report Share: Other editions Publication 01 April 2023 El Niño/La Niña Update (April 2023) Publication 01 November 2022 El Niño/La Niña Update (November 2022) Publication 01 August 2022 El Niño/La Niña Update (August 2022) View all editions