National Climatic Data Center (USA)

From EarthOps Dot Com

The National Climatic Data Center (NCDC) is the world's largest active archive of weather data. Our mission is to provide access and stewardship to the Nation's resource of global climate and weather related data and information, and assess and monitor climate variation and change. This effort requires the acquisition, quality control, processing, summarization, dissemination, and preservation of a vast array of climatological data generated by the national and international meteorological services. NCDC's mission is global in nature and provides the U.S. climate representative to the World Meteorological Organization (WMO), the World Data Center System, and other international scientific programs. NCDC also operates the World Data Center for Meteorology, Asheville.

Perhaps you would like to see their website.

Subsidiary Organizations and Resources

NCDC GIS Map Services

A variety of Geographic Information System (GIS) resources may be found at the NCDC GIS Map Services Index website.