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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August Very Wet: Very Dry:
1895 6.32% 7.87%
1896 5.61% 19.08%
1897 4.08% 8.52%
1899 7.94% 17.89%
1901 18.90% 8.96%
1903 12.45% 5.05%
1905 3.27% 8.34%
1907 7.16% 7.13%
1909 12.93% 15.08%
1911 11.62% 11.43%
1913 2.68% 16.57%
1915 22.10% 11.21%
1917 6.33% 11.03%
1919 8.61% 16.61%
1921 9.97% 11.12%
1923 16.48% 4.87%
1925 4.57% 18.79%
1927 11.46% 7.62%
1929 4.15% 28.52%
1931 12.12% 10.14%
1933 15.51% 7.01%
1935 5.86% 6.50%
1937 5.78% 15.35%
1939 6.77% 6.43%
1941 15.72% 3.65%
1943 3.86% 23.03%
1945 12.84% 4.51%
1947 10.63% 13.49%
1949 6.80% 10.19%
1951 15.44% 13.08%
1953 7.19% 16.19%
1955 15.82% 22.95%
1957 8.75% 20.50%
1959 6.86% 1.72%
1961 8.13% 4.66%
1963 10.48% 6.21%
1965 16.58% 1.26%
1967 7.84% 17.23%
1969 3.25% 25.29%
1971 12.76% 10.35%
1973 0.55% 13.43%
1975 18.43% 9.83%
1977 25.78% 0.18%
1979 14.95% 1.78%
1981 10.59% 6.86%
1983 20.60% 13.43%
1985 15.33% 18.19%
1987 8.71% 6.93%
1989 8.03% 3.68%
1991 7.02% 3.25%
1993 12.68% 7.26%
1995 8.52% 8.04%
1997 13.29% 6.98%
1999 10.75% 13.23%
2001 2.38% 16.94%
2003 7.52% 10.28%
2005 11.91% 4.09%
2007 12.23% 13.13%
2009 6.39% 8.84%
2011 7.73% 20.12%
2013 6.40% 10.42%