World Meteorological Day was established in 1951 to commemorate the establishment of the World Meteorological Organization (WMO) on 23 March 1950, this organization announces a slogan for World Meteorological Day every year, and this day is celebrated in all member countries.

The WMO, an organization of the United Nations, was created on 23 March 1950 to replace the International Meteorological Organization. It began operations in 1951 to coordinate member nations in the fields of meteorology, operational hydrology, and Earth sciences for the security of their population. The theme in 2026 is ‘Observing Today, Protecting Tomorrow’.

Watch the #WorldMetDay ceremony live on Monday, 23 March

State of the Global Climate 2025 – publication

Wereld Meteorologie Dag 2026 – KNMI

Meteorologen: aarde houdt meer warmte vast dan ooit, gevolgen nog eeuwen voelbaar