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 U.S. Climate Divisional Dataset. 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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June Very Warm: Very Cold:
1895 5.57% 15.48%
1896 19.85% 0.25%
1897 7.75% 9.18%
1899 6.60% 2.16%
1901 8.40% 14.53%
1903 3.25% 55.38%
1905 2.11% 4.46%
1907 0.00% 46.93%
1909 0.00% 0.35%
1911 39.93% 1.83%
1913 0.00% 17.15%
1915 4.17% 41.58%
1917 0.00% 19.02%
1919 20.41% 16.22%
1921 27.30% 4.13%
1923 5.78% 17.07%
1925 26.63% 0.58%
1927 1.45% 18.93%
1929 0.00% 4.77%
1931 27.41% 0.00%
1933 43.36% 1.55%
1935 0.00% 19.84%
1937 1.42% 0.08%
1939 7.31% 4.33%
1941 0.33% 15.58%
1943 24.45% 18.63%
1945 0.83% 47.52%
1947 0.10% 24.39%
1949 9.89% 0.00%
1951 0.00% 32.53%
1953 34.13% 12.12%
1955 0.00% 31.45%
1957 4.99% 0.00%
1959 13.84% 1.18%
1961 32.18% 17.86%
1963 2.34% 8.83%
1965 0.00% 20.18%
1967 5.25% 18.82%
1969 3.63% 29.12%
1971 8.12% 3.39%
1973 3.30% 4.37%
1975 0.00% 7.36%
1977 27.47% 5.03%
1979 0.00% 15.16%
1981 24.83% 2.55%
1983 0.21% 23.84%
1985 10.45% 14.87%
1987 15.00% 3.09%
1989 0.82% 11.87%
1991 10.06% 8.11%
1993 0.36% 9.25%
1995 7.09% 21.33%
1997 2.86% 12.48%
1999 4.35% 0.21%
2001 13.82% 0.47%
2003 8.94% 16.36%
2005 13.81% 2.03%
2007 13.09% 1.04%
2009 9.47% 0.08%
2011 30.86% 1.21%
2013 27.74% 0.00%