Sir John Theodore Houghton CBE FRS FLSW (30 December 1931 – 15 April 2020) was a Welsh atmospheric physicist who was the co-chair of the Intergovernmental Panel on Climate Change's (IPCC) scientific assessment working group which shared the Nobel Peace Prize in 2007 with Al Gore.

He was professor in atmospheric physics at the University of Oxford, former Director General at the Met Office and founder of the Hadley Centre.

[8] The third and youngest brother, Paul Houghton, became a lecturer in engineering and was treasurer and company chairman of the John Ray Initiative, connecting the environment, science and Christianity.

In 1962, Houghton married Dr Margaret Broughton, daughter of a mill owner in Colwyn, Lancashire, and they had two children and seven grandchildren.

[2][7][16] He received Honorary Doctorates of Science from the Universities of Wales (1991), Stirling (1992), East Anglia (1993), Leeds (1995), Heriot-Watt (1996), Greenwich (1997), Glamorgan (1998), Reading (1999), Birmingham (2000), Gloucestershire (2001), Hull (2002) and Dalhousie (2010).

[27] A metal sculpture of Sir John Houghton was erected in Rhyl in 2013, together with figures of two other local celebrities, Don Spendlove and Mike Peters.

[28] In a November 2006 article in Australia's The Daily Telegraph, journalist Piers Akerman quoted Houghton as saying "Unless we announce disasters, no one will listen", attributing the quotation to his 1994 book Global Warming, The Complete Briefing.