title: Historical weather data from NOAA
body: <p>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 <a href="http://www.ncdc.noaa.gov/cdo-web/search" rel="nofollow">http://www.ncdc.noaa.gov/cdo-web/search</a>. But I would like to access this data programmatically through an API. From what I have been reading on StackOverflow this data is supposed to be public domain, but the only place I have been able to find it is on non-free services like Wunderground. How can I access this data for free?</p>