World Meteorological Day was established in 1951 to commemorate the establishment of the World Meteorological Organization (WMO) on 23 March 1950, this organization announces a slogan for World Meteorological Day every year, and this day is celebrated in all member countries.

The WMO, an organization of the United Nations, was created on 23 March 1950 to replace the International Meteorological Organization. It began operations in 1951 to coordinate member nations in the fields of meteorology, operational hydrology, and Earth sciences for the security of their population. The theme in 2025 is ‘Closing the Early Warning Gap Together’. WMO confirmed that 2024 was the hottest year on record. Changes in our environment are driving more extreme weather events. Rapidly intensifying tropical cyclones, devastating rainfall, storm surges, flooding, deadly droughts, and wildfires are on the rise. Sea levels are increasing, exposing densely populated coastal areas to coastal inundation and ocean wave impacts. The societal effects of these events continue long after the headlines fade. World Meteorological Day is officially observed on 23 March each year.

United Nations Secretary-General’s Message for World Meteorological Day 2025

Statement by Dr. Abdulla Al Mandous, President of WMO, on the occasion of World Meteorological Day 2025