World Meteorological Day

   The Earth’s climate is more out of balance than at any time in observed history, as greenhouse gas concentrations drive continued warming of the atmosphere and ocean and melting of ice, according to the World Meteorological Organization (WMO) . These rapid and large-scale changes have occurred within a few decades but will have harmful repercussions for hundreds – and potentially thousands – of years. State of the Global Climate 2025 The global climate system is complex. In order to unpack such complexity, the WMO State of the Global Climate 2025 uses Climate Indicators to describe the changing climate. The following site aims to provide an overview of the annually produced State of the Climate report . Please note that for some indicators, 2025 data is not yet available. The latest available data is provided where this is the case. Greenhouse Gases Increasing levels of greenhouse gases, like carbon dioxide, in the atmosphere due to human activities are a major driver of...

  On this World Meteorological Day , we are reminded that foresight saves lives. Climate chaos is rewriting the rules of weather, with record heat, longer droughts, rising seas and ever more frequent and extreme disasters. Accurate, trusted science is our first line of defence. The World Meteorological Organization and national services help keep us safe by weaving a global web of data, from land, sea, air and space – turning measurements into forecasts, and forecasts into early warnings. Yet the global observing system is under strain, with critical gaps, especially in least developed countries and small island developing States. This year’s theme, Observing Today, Protecting Tomorrow, is a call to action. Governments, development banks and the private sector must scale up support for our global observing backbone, from surface stations to satellites, and ensure data is shared openly and equitably. And we must accelerate Early Warnings for All so that, by 2027, every person is pro...

    Watch the Message of Mr. Makoto Suwa on the occasion of the World Meteorological Day 2026

  Activities held for the World Meteorological Day 2026 in Mexico by the National meteorological service.

  Watch the  Activities held for the World Meteorological Day 2026 in Bolivia.

Activities held during the World Meteorological Day 2026 in Argentina

Activities held during the World Meteorological Day 2026 at the Waliguam Global Atmosphre Baseline Station in China .

Activities held during the World Meteorological Day 2026 in Puy de Dôme Sation in France.

  Watch the Activities held during the World Meteorological Day 2026 in Ghana.

Activities held for the World Meteorological Day 2026 in Romania.