Columbia University's International Research Institute for Climate Prediction (IRI) and Lamont-Doherty Earth Observatory (LDEO) have created this powerful Climate Data Library. The library "contains a wide variety of earth science data, primarily oceanographic and atmospheric datasets" and offers many ways of accessing and manipulating information. Specific topographical data or historical...

The mission of the National Oceanic and Atmospheric Administration (NOAA)'s Climate Prediction Center is "to maintain a continuous watch on short-term climate fluctuations and to diagnose and predict them." To that end, the site's main section, Climate Spotlight, offers a current monthly/seasonal forecast, updates on La Niña, a new tutorial on El Niño/La Niña, daily precipitation monitoring...