Established in 2003, The Institute of Environmental Science & Meteorology, or IESM, is an academic unit of the College of Science in the University of the Philippines, Diliman.

Merging the erstwhile Environmental Science Program (ESP) and the Department of Meteorology and Oceanography (DMO), the institute is envisioned to serve as a center of excellence in the environmental and atmospheric sciences in Asia Pacific; investigating natural phenomena contributing to many major decisions toward sustainable development in the country and the region.

IESM aims to contribute towards the advancement of the science of human impact and responses of the changing environment, and to understand and forecast weather systems and climate, reduce and manage atmospheric and hydro-meteorological hazards. IESM has grown much stronger with a total of 11 full time faculty members, 4 professorial lecturers, and a growing number of Adjunct Professors. After moving into its new home in 2014, research in IESM has increased significantly.

Recently, IESM has been designated as the Center of Excellence for Environmental Science by the Commission on Higher Education. Furthermore, along with our partner, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), IESM is a Regional Training Center for the World Meteorological Organization Region.