John Graham Kettley (born 11 July 1952 in Halifax, West Yorkshire) is a British freelance weatherman.
Brought up on Commercial Street and educated at Todmorden Grammar School (now called Todmorden High School) on Ferney Lee Road in Todmorden, he played cricket for Burnley and Todmorden. A geography teacher at his school sparked his interest in weather forecasting. He started Geography A-level, but never took the exam. He worked at the meteorological office at Manchester Airport for two years from 1970 before studying applied physics at what is now Coventry University, where he met his wife. He spent four years researching meteorology. He trained for a year in weather presentation at Reading College. From 1980, he worked at the Nottingham Weather Centre, presenting his first forecast for Radio Lincolnshire, then further forecasts for Midlands Today (Nottingham news opt-out, starting 28 May 1980) and Central Television. In 1985, he became a national forecaster on the BBC
Kettley used to work for the Met Office, and now presents weather forecasts for the BBC on Radio Five Live, mainly on Breakfast (6 - 9am).
In 2000 Kettley left the Met Office to join commercial weather company British Weather Services, and continues to provide forecasts across a range of media outlets and sporting concerns including the Football Association, Twickenham and leading UK racecourses such as Newbury, Cheltenham, Haydock Park, Newmarket - and Barbecues.