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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October Very Wet: Very Dry:
1895 0.26% 31.88%
1896 10.17% 4.26%
1897 11.47% 12.57%
1898 14.88% 10.19%
1899 8.90% 0.61%
1900 11.25% 0.60%
1901 1.15% 7.66%
1902 1.91% 11.03%
1903 2.17% 9.93%
1904 7.75% 17.77%
1905 6.28% 12.45%
1906 6.88% 14.26%
1907 12.67% 11.06%
1908 12.65% 13.54%
1909 0.00% 13.01%
1910 4.28% 3.75%
1911 13.80% 2.87%
1912 8.55% 0.82%
1913 7.83% 7.81%
1914 12.01% 1.79%
1915 4.55% 24.62%
1916 13.90% 2.15%
1917 6.71% 42.02%
1918 10.63% 1.67%
1919 28.36% 1.00%
1920 6.66% 6.42%
1921 1.54% 20.98%
1922 2.08% 7.01%
1923 16.77% 0.55%
1924 9.97% 30.58%
1925 22.66% 1.85%
1926 6.74% 5.63%
1927 9.68% 2.96%
1928 8.06% 4.33%
1929 12.63% 9.86%
1930 13.86% 3.32%
1931 0.95% 3.86%
1932 14.70% 3.67%
1933 1.58% 12.70%
1934 3.37% 22.24%
1935 0.12% 14.60%
1936 7.97% 10.44%
1937 11.95% 5.38%
1938 5.64% 30.26%
1939 0.02% 6.98%
1940 3.30% 7.10%
1941 43.52% 0.96%
1942 9.23% 2.48%
1943 4.20% 5.10%
1944 0.98% 18.83%
1945 6.90% 8.50%
1946 26.19% 1.39%
1947 10.79% 6.00%
1948 0.50% 6.68%
1949 15.53% 2.60%
1950 8.98% 18.65%
1951 10.52% 1.21%
1952 0.84% 78.42%
1953 1.91% 19.68%
1954 9.22% 5.10%
1955 6.29% 12.90%
1956 8.23% 7.95%
1957 19.75% 0.58%
1958 1.61% 17.32%
1959 29.20% 5.80%
1960 10.31% 3.01%
1961 0.67% 5.30%
1962 6.59% 1.77%
1963 1.84% 32.72%
1964 6.38% 37.59%
1965 1.46% 25.85%
1966 0.66% 9.48%
1967 9.04% 10.39%
1968 5.57% 1.42%
1969 17.42% 1.49%
1970 13.95% 3.00%
1971 19.41% 0.88%
1972 18.35% 1.54%
1973 5.72% 5.59%
1974 16.05% 11.45%
1975 14.89% 14.31%
1976 12.21% 6.63%
1977 8.89% 5.61%
1978 0.85% 28.95%
1979 5.98% 4.07%
1980 3.33% 4.51%
1981 17.07% 0.45%
1982 14.34% 6.96%