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 Wet: Very Dry:
1895 15.52% 1.38%
1896 21.92% 3.34%
1897 12.77% 9.73%
1898 5.24% 0.00%
1899 8.12% 11.25%
1900 9.06% 2.54%
1901 1.54% 19.06%
1902 12.31% 5.95%
1903 7.41% 33.92%
1904 0.00% 60.48%
1905 21.77% 7.03%
1906 17.38% 4.06%
1907 9.40% 14.78%
1908 4.71% 16.33%
1909 29.48% 11.49%
1910 7.67% 19.86%
1911 2.73% 6.29%
1912 1.64% 27.64%
1913 12.50% 8.57%
1914 3.12% 40.68%
1915 1.62% 8.55%
1916 0.26% 14.53%
1917 0.00% 46.86%
1918 9.09% 0.39%
1919 23.51% 3.02%
1920 3.31% 6.48%
1921 14.68% 11.19%
1922 15.31% 14.79%
1923 7.76% 6.11%
1924 0.24% 22.32%
1925 1.49% 4.62%
1926 15.13% 1.91%
1927 15.60% 9.37%
1928 11.13% 11.75%
1929 6.97% 26.34%
1930 10.31% 6.16%
1931 19.74% 11.50%
1932 5.07% 24.97%
1933 0.00% 29.36%
1934 11.66% 2.05%
1935 2.08% 1.93%
1936 0.00% 31.91%
1937 2.71% 11.35%
1938 1.12% 6.63%
1939 2.36% 52.56%
1940 18.15% 1.10%
1941 1.47% 4.70%
1942 14.05% 14.40%
1943 0.94% 12.10%
1944 15.52% 0.94%
1945 5.83% 15.41%
1946 21.51% 3.06%
1947 14.84% 0.00%
1948 20.52% 9.97%
1949 0.00% 41.98%
1950 8.60% 19.32%
1951 4.51% 3.96%
1952 6.35% 8.02%
1953 2.17% 17.58%
1954 0.65% 22.02%