75 Years of WMO Science for Action

Collage of people engaged in various scientific activities, connected by white lines and dots, on a blue background.

The World Meteorological Organization celebrates 75 years as a specialized agency of the United Nations in 2025, turning science into action for the global good. The enactment of the WMO Convention on 23 March 1950 created an organization that would become the UN system’s authoritative voice on weather, climate, and water. 

Since its establishment, WMO has coordinated and leveraged the work of National Meteorological and Hydrological Services and partners around the world. It has set – and constantly raised – standards for high-quality, authoritative information and services to support decision-making in all sectors of the economy and society. 

WMO has pioneered Earth System science to save lives and livelihoods and support sustainable development and socio-economic well-being. The cumulative benefits of this translates into many billions of dollars and millions of lives saved. 

WMO Science for Action

Weather

Climate

Water

Research
The Extraordinary Session of the World Meteorological Congress (Cg-Ext 2025)
Cg‑Ext(2025) will take place from 20 to 23 October 2025 at the WMO Headquarters in Geneva, Switzerland, preceded by the virtual extraordinary session of the Financial Advisory Committee (FINAC‑Ext(2025)) on 14 October 2025 and followed by the extraordinary session of the Executive Council (EC‑Ext(2025)) on 24 October 2025.
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Events

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Extraordinary session of the virtual Financial Advisory Committee (FINAC-Ext(2025)) ​
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Genève, Switzerland

Extraordinary session of Congress in 2025 (Cg-Ext(2025))
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High-Level Event on the Early Warnings for All (EW4All) Initiative
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Geneva, Switzerland

Extraordinary session of the Executive Council (EC‑Ext(2025))
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The climate stripes were created by Professor Ed Hawkins at the University of Reading in 2018. They show clearly and vividly how global average temperatures have risen over nearly two centuries.
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WMO Members at Work
As part of the 75th anniversary of the World Meteorological Organization, we are shining a spotlight on the people and institutions who make WMO what it is: our Members. This special Members at Work collection showcases the stories and images shared by WMO Members from every region of the world.
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Voices of Members
In this special video series marking WMO’s 75th anniversary, Members share their perspectives on the Organization’s greatest achievements and its vision for the future. Through their reflections, we revisit key milestones that have advanced global weather, climate, and water services — and look ahead to the priorities that will shape WMO’s key priorities for the future.
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