The National Climatic Data Center (NCDC) calculates new climatological normals every 10 years based upon the previous 30-year period. Climatological normals of temperature and precipitation are two of the most common types of normals but many other normals (such as winds, snowfall and heating degree days) are calculated. Prior to July 1, 2011, the 30-year period used in the calculation of climatological normals was from 1971 to 2000. From now through the next decade, the new 30-year period used to calculate climatological normals will be from 1981 through 2010. Officially, these new normals began being used as of August 1, 2011 in our daily climate products:
The new normals (1981-2010) will be incorporated into the 2011 August monthly climate information (which will be produced on September 1, 2011). Our monthly climate products are:
For more information on the new climatological normals, please go to the NCDC web page. Monthly data exists below (click images for higher resolution) for Corpus Christi, Victoria and Laredo.
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