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National Climatic Data Center (NCDC)

This database is freely available to the general public via the Internet.


NCDC is the section of the National Oceanographic and Atmospheric Administration (NOAA) that preserves and provides climatic data to the public, business, industry, government, and researchers. It is the largest weather archive in the world housing information collected by Thomas Jefferson, as well as that collected by modern satellites. NCDC responds to worldwide inquiries about the climate. It acquires information from the National Weather Service, the military, the Federal Aviation Administration, the Coast Guard, and voluntary cooperative observers. Topics cover current events, products and services, free data, data access tools, most popular resources, links to regional climate centers, and data about global hazards.

NCDC operates the following databases:

  • Global Terrestrial Observing System (GTOS)
    Helps researchers and policy makers manage global and regional environmental change by observing, modeling, and analyzing ecosystems that support sustainable development.

See also NCDC's Online Climate Data Directory at

Federal law requires NOAA to recover its costs by charging for selected data. However, all information is gratis for users in the gov, edu, mil, and us domains. Free data is also available for K-12 education.

Dates Covered

18th Century - present.

Print Counterpart

Select the Free Data link on the home page to view nearly 40 titles in pdf and/or html formats.

NCDC - Image and Publications System
View current and historical local climatological data, hourly precipitation data, storm data, national summary data, and world monthly climatic statistics.

Related Databases

  • Climate Prediction Center  (U.S. National Oceanic and Atmospheric Administration (NOAA). National Weather Service) - Predicts, monitors, and assesses the nation's weather.
  • Space Weather Data and Products (U.S. National Oceanic and Atmospheric Administration (NOAA). National Weather Service)
  • U.S. Climate Reference Network (USCRN) (U.S. National Oceanic and Atmospheric Administration (NOAA)) - Maintains 114 centers in the U.S. that develops projections of long-term temperature and precipitation tied historical observations.


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