He studied geography, mathematics and physics at the University of Zurich, where meteorology was not offered. He dropped out of the university before being awarded his degree and became a freelance contributor to a Swiss newspaper, the Sonntagsblick. In between he also worked for Schaffhausen local radio station Radio Munot. From there he moved to the Scientific Editorship of Swiss Television SRG and in 1988 he became Deputy Editor in Chief of Schweizer Illustrierte.

For a long time he had faxed unsolicited weather forecasts to Südwestfunk. Eventually these were adopted. In 1989, Jörg Kachelmann bought an old farmhouse in Bächli and rebuilt this into a high tech weather station. In 1991 he founded the Meteomedia AG weather service operating over 1000 weather stations in Germany alone. In 1996 Kachelmann became Programm Director of the German version of the American television Weather Channel named Der Wetterkanal.

Apart from producing weather forecasts for ARD and various other broadcasters, Kachelmann acted in other areas. In 1996 he presented the German programme “Vorsicht Blöff”, appeared from 1999 to 2004 on the MDR Fernsehen talk show “Riverboat”, to which he returned in 2007 and which he gave up due to lack of time in 2009.