Jukka Petteri Taalas is a Finnish meteorologist and Secretary-general of the World Meteorological Organization. Appointed in 2015 by the World Meteorological Congress, the supreme body of the Organization, he took up the four-year Secretary-General term on 1 January 2016, and was re-elected to a second four-year term on 13 June 2019. He was director general of the Finnish Meteorological Institute from 2002 to 2005 and 2007 to 2015.