U.S. Percentage Areas (Very Warm/Cold, Very Wet/Dry)

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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May Very Wet: Very Dry:
1895 7.84% 5.40%
1896 23.37% 18.12%
1897 6.27% 22.11%
1898 27.24% 8.70%
1899 1.95% 17.32%
1900 6.09% 12.50%
1901 7.06% 12.37%
1902 12.22% 3.43%
1903 9.93% 15.21%
1904 0.95% 4.90%
1905 14.59% 3.21%
1906 24.45% 7.17%
1907 11.77% 0.77%
1908 28.58% 0.32%
1909 5.89% 9.03%
1910 0.00% 13.12%
1911 5.74% 30.67%
1912 13.84% 6.44%
1913 3.32% 9.44%
1914 10.31% 15.31%
1915 28.30% 1.77%
1916 1.35% 3.22%
1917 18.37% 5.69%
1918 5.27% 7.85%
1919 3.00% 2.14%
1920 0.56% 6.88%
1921 9.65% 11.71%
1922 4.44% 0.15%
1923 10.75% 7.73%
1924 3.10% 27.90%
1925 4.17% 19.31%
1926 0.25% 10.20%
1927 14.90% 18.27%
1928 4.07% 16.07%
1929 20.16% 12.87%
1930 15.57% 4.64%
1931 2.76% 14.53%
1932 1.34% 13.65%
1933 12.37% 2.79%
1934 4.20% 45.72%
1935 22.80% 7.43%
1936 5.43% 26.06%
1937 4.55% 14.71%
1938 10.01% 3.43%
1939 0.95% 18.54%
1940 3.34% 20.71%
1941 16.26% 20.24%
1942 21.10% 15.01%
1943 10.78% 4.89%
1944 8.04% 3.64%
1945 11.36% 18.17%
1946 14.48% 1.77%
1947 12.44% 6.42%
1948 8.86% 12.45%
1949 8.27% 4.73%
1950 5.39% 10.96%
1951 4.63% 13.56%
1952 0.17% 8.10%
1953 16.96% 7.70%
1954 2.11% 8.77%
1955 6.63% 4.47%
1956 4.97% 5.16%
1957 42.42% 1.09%
1958 1.82% 9.23%
1959 8.86% 4.92%
1960 9.10% 5.95%
1961 7.68% 9.59%
1962 18.72% 20.77%
1963 1.80% 17.76%
1964 2.36% 12.22%
1965 13.30% 15.49%
1966 4.35% 24.12%
1967 3.91% 8.34%
1968 7.01% 1.78%
1969 4.64% 10.42%
1970 7.77% 16.57%
1971 11.07% 5.85%
1972 8.93% 4.27%
1973 10.13% 7.15%
1974 10.05% 21.45%
1975 8.62% 4.21%
1976 10.68% 10.29%
1977 15.03% 13.81%
1978 11.56% 3.55%
1979 13.19% 2.00%
1980 17.84% 10.56%
1981 19.38% 2.50%
1982 20.41% 7.52%
1983 12.11% 2.62%
1984 13.58% 13.27%
1985 1.97% 4.85%
1986 2.60% 6.80%
1987 18.66% 4.14%
1988 1.75% 23.63%
1989 11.39% 5.30%
1990 21.15% 1.73%
1991 18.83% 4.88%
1992 12.57% 25.40%
1993 9.10% 6.25%
1994 5.02% 10.94%
1995 32.62% 1.13%
1996 22.02% 14.26%
1997 3.40% 6.21%
1998 17.60% 24.97%
1999 7.19% 4.48%
2000 4.45% 18.75%
2001 7.21% 15.53%
2002 6.98% 19.85%
2003 13.77% 6.09%
2004 20.17% 14.97%
2005 16.86% 10.83%
2006 3.56% 12.73%
2007 17.28% 19.72%
2008 10.79% 6.42%
2009 17.04% 9.83%
2010 12.17% 4.88%
2011 21.17% 16.22%
2012 6.11% 19.96%
2013 15.60% 8.66%