About World Meteorological Day

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 theme for 2023 is: The future of weather, climate and water across generations.

The future of weather, climate and water across generations

We live in an interconnected planet. We share one Earth, with one atmosphere and one ocean.

Our weather and climate and the water cycle know no national or political boundaries. International cooperation is essential. This philosophy has driven the work of the world’s meteorological community since 1873 and will guide us as we translate science into services for society for present and future generations. 

World Meteorological Day 2023 takes place during WMO’s 150th anniversary. It highlights past achievements, present progress and future potential - from the late 19th century telegraphs and shipping forecasts to supercomputers and space technology. 

The one constant throughout is the dedication of National Meteorological and Hydrological Services who work around the clock to collect and standardize data and provide us with better forecasts which underpin every aspect of our daily lives. The history of WMO data exchange is a remarkable story of scientific vision, technological development and service provision and, most of all, of a unique system of cooperation to serve society. 

The anniversary also serves as a reminder of our changing climate. The International Meteorological Organization – the predecessor of the World Meteorological Organization – was established in 1873 in an era when pollution from industrial and human activities was  at its beginning. 

As a result of heat-trapping greenhouse gases, the average global temperature is now more than 1° Celsius higher today compared to 150 years ago. Our weather is more extreme, our ocean is warmer and more acidic, sea levels have risen and glaciers and ice are melting. The rate of change is accelerating. We need urgent action now to slash emissions and to ensure that future generations can both survive and thrive on our planet. 

The good news is that rapid scientific and technological advances have greatly improved the accuracy of weather forecasts and life-saving early warnings. Big data is being exchanged more freely among a wider community than ever before, and there are new tools including machine learning and Artificial Intelligence.  

There has been significant progress to monitor, simulate and project the global climate. Climate information supports decision-making in a wide range of practical end-user applications.  

Our weather, climate and water cycle will be different in future than in the past. Weather, climate and hydrological services will help us tackle the associated challenges and seize the opportunities.