Start and end times (year and month)

El Niño

1963.7-1964.1, 1965.3-1966.3, 1968.11-1969.4, 1972.6-1973.2,

1982.5-1983.6, 1986.9-1988.1, 1991.6-1992.7, 1994.10-1995.3,

1997.5-1998.5, 2002.5-2003.3, 2004.7-2005.5, 2006.8-2007.1,

2009.6-2010.4, 2015.3-2016.3

La Niña

1964.4-1965.1, 1967.12-1968.5, 1970.7-1972.1, 1973.5-1974.7,

1975.2-1976.4, 1984.10-1985.5, 1988.5-1989.5, 1995.9-1996.2,

1998.7-2000.5, 2007.9-2008.5, 2010.7-2011.3