This website provides access to atmospheric and climatological data from a variety of National Oceanic & Atmospheric Administration sources. It also contains numerous tools for retrieving and displaying the data. You can either download raw data or use the tools to construct finished data products. The user is asked to enter such information as type of analysis, time-scale, dataset, variability, and time range of data. Web pages that meet the entered criteria are then generated, and include monthly/seasonal composites, linear monthly/seasonal correlations, daily composites, United States climate division maps, time-section plots, wavelets, chi corrected heating atlas, daily data plots, and others.

No specific technical requirements, just a browser required

No cost

The information on government servers are in the public domain, unless specifically annotated otherwise, and may be used freely by the public. When any of these materials are used, credit must be given to the National Oceanic and Atmospheric Administration/Department of Commerce unless otherwise instructed to give credit to another source.

Publisher: National Oceanic and Atmospheric Administration, Office of Oceanic and Atmospheric Research, Climate Diagnostics Center
http://www.cdc.noaa.gov/