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%
1955 2.42% 13.46%
1956 4.50% 33.76%
1957 24.87% 0.81%
1958 8.46% 1.18%
1959 6.38% 17.09%
1960 4.89% 12.10%
1961 8.51% 2.83%
1962 3.19% 16.77%
1963 7.25% 4.81%
1964 4.75% 1.96%
1965 10.32% 17.39%
1966 4.05% 14.70%
1967 2.60% 10.89%
1968 8.75% 0.78%
1969 3.80% 17.44%
1970 11.67% 9.04%
1971 5.58% 3.09%
1972 20.01% 3.96%
1973 17.43% 5.86%
1974 1.25% 1.32%
1975 9.57% 0.75%
1976 2.45% 45.77%
1977 11.26% 0.66%
1978 18.82% 3.48%
1979 6.70% 3.90%
1980 1.35% 15.17%
1981 7.44% 12.46%
1982 12.29% 0.31%
1983 39.03% 0.00%
1984 8.29% 2.08%
1985 35.57% 0.70%
1986 21.32% 3.05%
1987 13.81% 3.40%
1988 17.41% 4.21%
1989 2.30% 25.85%
1990 2.99% 4.86%
1991 13.28% 1.61%
1992 24.81% 6.66%
1993 6.29% 5.32%
1994 15.63% 0.49%
1995 6.48% 6.98%
1996 17.98% 1.76%
1997 5.55% 2.58%
1998 13.71% 6.88%
1999 0.00% 37.14%
2000 23.72% 3.03%
2001 10.56% 7.91%
2002 1.20% 14.43%
2003 5.94% 0.00%
2004 27.86% 5.55%
2005 7.47% 12.31%