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Climate Normals

Climate Normals are three-decade averages of climatological variables including temperature and precipitation. This product is produced once every 10 years. The 1981–2010 U.S. Climate Normals dataset is the latest release of NCEI’s Climate Normals. This dataset contains daily and monthly Normals of temperature, precipitation, snowfall, heating and cooling degree days, frost/freeze dates, and growing degree days calculated from observations at approximately 9,800 stations operated by NOAA’s National Weather Service.

  • 1981–2010 U.S. Climate Normals
    Access to the 1981–2010 temperature and precipitation Climate Normals and visualizations that demonstrate cycles and interesting features within the data. Answers to frequently asked questions about the 1981–2010 Climate Normals and a list of reference publications are also provided.
  • 1971–2000 U.S. Climate Normals Data and Information 
    Access to the previous version of the U.S. Climate Normals, which includes similar products to the updated 1981–2010 Climate Normals.