World Meteorological Day (WMD) has been celebrated around the world on 23 March every year since the first World Meteorological Day in 1961. The Day commemorates the entry-into-force, on 23 March 1950, of the Convention of the World Meteorological Organization (WMO).The previous themes are:

1961 Meteorology - general themes

1962 Contribution of meteorology to agriculture and food production

1963 Transport and meteorology (in particular, application of meteorology to aviation)

1964 Meteorology as a factor of economic development

1965 International cooperation in meteorology

1966 World Weather Watch

1967 Weather and water

1968 Meteorology and agriculture

1969 The economic value of meteorological services

1970 Meteorological education and training

1971 Meteorology and human environment

1972 Meteorology and human environment

1973 One hundred years of international cooperation in meteorology

1974 Meteorology and tourism

1975 Meteorology and telecommunications

1976 Weather and food

1977 Weather and water

1978 Meteorology and research for the future

1979 Meteorology and energy

1980 Man and climatic variability

1981 World Weather Watch as a tool for development

1982 Observing the weather from space

1983 The weather observer

1984 Meteorology aids food production

1985 Meteorology and public safety

1986 Climate variations, drought and desertification

1987 Meteorology: a model of international cooperation

1988 Meteorology and the media

1989 Meteorology in the service of aviation

1990 Natural disaster reduction: how meteorological and hydrological services can help

1991 The atmosphere of the living planet Earth

1992 Weather and climate services for sustainable development

1993 Meteorology and the transfer of technology

1994 Observing the weather and climate

1995 Public weather services

1996 Meteorology in the service of sports

1997 Weather and water in cities

1998 Weather, oceans and human activity

1999 Weather, climate and health

2000 The World Meteorological Organization - 50 years of service

2001 Volunteers for weather, climate and water

2002 Reducing vulnerability to weather and climate extremes

2003 Our future climate

2004 Weather, climate and water in the information age

2005 Weather, climate, water and sustainable development

2006 Preventing and mitigating natural disasters

2007 Polar meteorology; understanding global impacts

2008 Observing our planet for a better future

2009 Weather, climate and the air we breathe