U.S. Percentage Areas (Very Warm/Cold, Very Wet/Dry)

NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.

The percentage areas of the contiguous United States are computed based on the climate division data set. Those climate divisions having the monthly average temperature/total precipitation in the top ten percent (> 90th percentile) of their historical distribution are very warm/wet and those in the bottom ten percent (< 10th percentile) are very cold/dry.

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November Very Warm: Very Cold:
1895 0.00% 22.39%
1896 11.86% 37.57%
1897 1.11% 9.25%
1898 0.00% 32.42%
1899 35.87% 0.25%
1900 2.54% 6.16%
1901 14.16% 22.40%
1902 32.37% 0.88%
1903 3.75% 17.86%
1904 21.15% 8.03%
1905 0.35% 2.20%
1906 0.00% 4.65%
1907 0.00% 5.84%
1908 0.72% 0.00%
1909 40.89% 0.00%
1910 10.91% 21.92%
1911 0.00% 55.08%
1912 1.65% 1.35%
1913 39.32% 0.00%
1914 17.46% 1.56%
1915 8.01% 0.00%
1916 0.00% 19.00%
1917 32.46% 15.62%