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 Wet: Very Dry:
1895 1.56% 27.38%
1896 9.01% 6.27%
1897 25.04% 0.00%
1898 15.08% 10.82%
1899 19.13% 5.68%
1900 9.40% 12.92%
1901 2.76% 3.69%
1902 13.54% 0.86%
1903 10.21% 3.83%
1904 26.91% 13.08%
1905 21.43% 3.31%
1906 23.60% 1.62%
1907 15.81% 15.95%
1908 6.45% 10.61%
1909 3.90% 8.73%
1910 1.05% 53.67%
1911 3.29% 32.65%
1912 25.99% 8.00%
1913 14.41% 1.03%
1914 0.48% 20.42%
1915 3.76% 30.19%
1916 7.21% 15.67%
1917 6.48% 8.78%
1918 9.04% 22.54%
1919 10.36% 3.12%
1920 8.55% 2.57%
1921 9.31% 5.79%
1922 21.30% 4.51%
1923 5.99% 11.59%
1924 6.39% 13.88%
1925 2.56% 31.23%
1926 15.95% 24.73%
1927 6.02% 5.21%
1928 5.78% 7.84%
1929 16.73% 3.85%
1930 4.40% 18.39%
1931 2.18% 4.21%
1932 9.23% 6.03%
1933 4.40% 13.68%
1934 5.48% 13.12%
1935 8.41% 3.72%
1936 7.54% 19.44%
1937 3.65% 18.52%
1938 26.50% 2.08%
1939 0.48% 8.07%
1940 4.99% 7.31%
1941 16.07% 22.85%
1942 11.11% 8.97%
1943 4.14% 0.00%
1944 13.77% 3.05%
1945 22.64% 7.72%
1946 10.33% 4.18%
1947 2.56% 9.78%
1948 7.11% 3.99%
1949 4.67% 5.76%
1950 10.24% 14.09%
1951 9.40% 3.94%
1952 12.30% 1.00%
1953 5.29% 3.25%
1954 8.70% 13.56%
1955 4.53% 32.95%
1956 2.46% 44.10%
1957 11.14% 7.41%
1958 12.89% 14.49%
1959 5.34% 25.57%
1960 1.97% 11.61%
1961 14.15% 4.76%
1962 0.17% 6.88%
1963 7.06% 11.73%
1964 6.50% 0.80%
1965 2.96% 17.36%
1966 4.22% 32.83%
1967 4.61% 20.04%
1968 5.05% 14.61%
1969 1.62% 26.31%
1970 10.45% 0.82%
1971 4.40% 30.96%
1972 3.05% 21.98%
1973 39.59% 3.35%
1974 10.46% 2.80%
1975 19.39% 0.08%
1976 8.50% 3.56%
1977 22.13% 3.07%
1978 12.97% 19.54%
1979 16.88% 5.58%
1980 17.13% 4.21%
1981 11.22% 17.01%
1982 12.38% 7.36%
1983 39.34% 1.54%
1984 8.80% 4.60%
1985 12.81% 9.30%
1986 0.45% 10.12%
1987 12.78% 4.04%
1988 1.97% 16.70%
1989 14.19% 1.95%
1990 15.87% 4.30%
1991 20.92% 0.29%
1992 9.28% 9.29%
1993 9.75% 1.97%
1994 8.96% 24.54%
1995 23.51% 5.52%
1996 1.21% 9.66%
1997 9.08% 27.55%
1998 22.27% 0.81%