The World Meteorological Organization is the UN's voice on weather, climate, and water resources, providing scientific insights into our atmosphere and climate behavior.

Overview WMO is the United Nations system's authoritative voice on the state and behaviour of the Earth's atmosphere, its interaction with the land and oceans, the weather and climate it produces and …

Our Mandate We advance meteorological science for a better future for all. WMO provides the framework for international cooperation to advance meteorological, climatological, hydrological, and …

2 days ago · WMO publishes the Global and Regional State of the Climate reports, the State of Climate Services reports, is involved in leadership capacity in the Global Framework for Climate Services, …

4 days ago · Knowledge Hub Explore the new Knowledge Hub: the scientific core of the WMO Community. A central place for WMO Members, partners and experts to find technical information, …

Again. Geneva, 15 November (WMO) - The abundance of heat-trapping greenhouse gases in the atmosphere once again reached a new record last year and there is no end in sight to the rising …

Nov 6, 2025 · Climate change is the term used to describe changes in the state of the climate that can be identified by changes in the average and/or the variability of its properties and that persists for an …

WMO Bulletin The WMO Bulletin is published twice per year in Arabic, Chinese, English, French, Russian and Spanish editions. The Bulletin contains articles on various topics related to weather, …

All Activities WMO’s work involves a wide variety of activities and services, spanning from research to delivery of weather-, climate-, and water-related services.

This is the warmest year in the 175-year observational record. The State of the Global Climate 2024 report underlined the massive economic and social upheavals from extreme weather and the long …