Every 23 March, the World Meteorological Organization commemorates the coming into force of the Convention establishing the World Meteorological Organization on 23 March 1950.

It showcases the essential contribution of National Meteorological and Hydrological Services to the safety and wellbeing of society and is celebrated with activities around the world. The themes chosen for World Meteorological Day reflect topical weather, climate or water-related issues.

The future of weather, climate and water across generations

The international meteorological organization – WMO as we know it today – turns 150 this year. We started life with morse code and telegraphs and now embrace super-computing, satellites and artificial intelligence. Our long history of data exchange was a pioneer for the Big Data revolution. Our World Weather Watch preceded the World Wide Web (and is just as important!).

Our birth in 1873 was before pollution from greenhouse gases. Climate change is now the defining challenge of our times – and will shape the life of future generations.

Join us on our journey.