I am working on a data mining project and I would like to gather historical weather data. I am able to get historical data through the web interface that they provide at http://
For a list of all service APIs provided by the National Climatic Data Center: http://www.ncdc.noaa.gov/cdo-web/webservices
Full documentation to the API which backs the search page you listed: http://www.ncdc.noaa.gov/cdo-web/webservices/v2
Requires a token, and limits to 1000 requests per day. If you need the limit increased for legitimate reasons contact http://www.ncdc.noaa.gov/customer-support.
Also, for bulk downloading use ftp: ftp://ftp.ncdc.noaa.gov/pub/data/