"The Climate Monitoring and Diagnostics Laboratory (CMDL) of the National Oceanic and Atmospheric Administration conducts sustained observations and research related to source and sink strengths, trends and global distributions of atmospheric constituents that are capable of forcing change in the climate of Earth through modification of the atmospheric radiative environment, those that may cause...

The National Climate Data Center has recently released weather data from the last thirty years, which is used by forecasters to compare day-to-day normal conditions. The daily and monthly reports are available for download in ASCII or PDF formats and include data on such things as average daily temperatures and precipitation from nearly 8,000 weather stations in the United States, Puerto Rico, the...