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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October Very Wet: Very Dry:
1895 0.26% 31.88%
1896 10.17% 4.26%
1897 11.47% 12.57%
1899 8.90% 0.61%
1901 1.15% 7.66%
1903 2.17% 9.93%
1905 6.28% 12.45%
1907 12.67% 11.06%
1909 0.00% 13.01%
1911 13.80% 2.87%
1913 7.83% 7.81%
1915 4.55% 24.62%
1917 6.71% 42.02%
1919 28.36% 1.00%
1921 1.54% 20.98%
1923 16.77% 0.55%
1925 22.66% 1.85%
1927 9.68% 2.96%
1929 12.63% 9.86%
1931 0.95% 3.86%
1933 1.58% 12.70%
1935 0.12% 14.60%
1937 11.95% 5.38%
1939 0.02% 6.98%
1941 43.52% 0.96%
1943 4.20% 5.10%
1945 6.90% 8.50%
1947 10.79% 6.00%
1949 15.53% 2.60%
1951 10.52% 1.21%
1953 1.91% 19.68%
1955 6.29% 12.90%
1957 19.75% 0.58%
1959 29.20% 5.80%
1961 0.67% 5.30%
1963 1.84% 32.72%
1965 1.46% 25.85%
1967 9.04% 10.39%
1969 17.42% 1.49%
1971 19.41% 0.88%
1973 5.72% 5.59%
1975 14.89% 14.31%
1977 8.89% 5.61%
1979 5.98% 4.07%
1981 17.07% 0.45%
1983 14.00% 0.13%
1985 16.42% 0.02%
1987 4.87% 27.25%
1989 1.48% 4.99%
1991 7.60% 5.24%
1993 1.80% 1.49%
1995 20.72% 20.77%
1997 8.42% 2.26%
1999 1.08% 21.86%
2001 7.73% 11.74%
2003 4.65% 12.45%
2005 16.60% 12.82%
2007 16.66% 5.28%
2009 44.64% 2.89%
2011 5.58% 2.49%
2013 13.90% 5.71%