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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March Very Warm: Very Cold:
1895 0.00% 6.64%
1896 0.00% 22.75%
1897 9.36% 37.08%
1898 10.68% 17.24%
1899 0.00% 29.68%
1900 29.15% 9.89%
1901 0.00% 0.00%
1902 6.86% 6.88%
1903 22.01% 1.18%
1904 18.44% 7.96%
1905 31.05% 0.00%
1906 0.00% 51.18%
1907 50.87% 1.12%
1908 31.02% 0.00%
1909 0.00% 1.32%
1910 88.64% 0.00%
1911 24.07% 1.69%
1912 0.45% 49.64%
1913 2.39% 16.73%
1914 8.58% 10.78%
1915 6.35% 49.27%
1916 25.03% 10.34%
1917 0.00% 34.56%
1918 49.01% 0.00%
1919 0.00% 5.53%
1920 0.00% 0.35%
1921 63.97% 0.00%
1922 0.00% 16.51%
1923 0.00% 18.46%
1924 0.00% 37.45%
1925 12.18% 0.00%
1926 11.26% 25.79%
1927 0.54% 0.00%
1928 5.43% 0.00%
1929 9.21% 0.00%
1930 0.00% 3.72%
1931 1.06% 19.74%
1932 0.00% 31.47%
1933 0.00% 0.00%
1934 31.81% 1.12%
1935 37.87% 7.63%
1936 9.85% 0.00%
1937 0.00% 7.77%
1938 48.33% 1.32%
1939 0.00% 2.07%
1940 9.68% 7.14%
1941 8.07% 27.88%
1942 2.33% 3.34%
1943 0.00% 16.75%
1944 0.00% 9.26%
1945 51.47% 7.00%
1946 52.13% 0.00%
1947 5.33% 32.10%
1948 1.10% 33.56%