National Climatic Data Center Online Document Library  FULL-TEXT
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National Centers for Environmental Information provides climate, historical weather data, informationlocal climatological data, climatological data, storm data, hourly precipitation data, and monthly climatic data for the world, Its national summary data include a national general summary of weather conditions, observed extremes of temp & precip by states, climatological data by station, heating degree/cooling degree days, flood data and losses, and storm summaries. Upper air data, sunshine and solar radiation data are also summarized.