The day was established at the first International Meteorological Congress in Vienna, Austria, in 1873 and on March 23, 1950, International Meteorological Organization became the World Meteorological Organization.
The theme for 2020 is 'Climate and Water', which will align with the theme of World Water Day 2020, focusing on climate change and water.
The slogan for World Meteorological Day 2020 or WMD 2020 is "Count Every Drop, Every Drop Counts".