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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April Very Wet: Very Dry:
1895 3.13% 13.71%
1896 18.41% 14.23%
1897 3.87% 5.87%
1898 0.00% 5.10%
1899 1.07% 21.96%
1900 37.12% 11.17%
1901 8.89% 5.32%
1902 0.00% 8.60%
1903 0.00% 10.46%
1904 2.45% 10.58%
1905 26.89% 7.33%
1906 8.50% 13.70%
1907 2.47% 5.86%
1908 12.86% 7.10%
1909 5.33% 23.31%
1910 0.63% 8.66%
1911 9.77% 4.11%
1912 10.31% 0.00%
1913 0.73% 2.52%
1914 8.46% 1.52%
1915 26.31% 25.54%
1916 3.67% 5.70%
1917 6.74% 2.32%
1918 6.40% 7.81%
1919 6.19% 0.25%
1920 17.99% 4.51%
1921 7.96% 2.34%
1922 17.15% 2.01%
1923 8.19% 1.19%
1924 4.39% 15.73%
1925 2.62% 13.07%
1926 17.14% 19.94%
1927 20.33% 9.06%
1928 11.46% 7.34%
1929 9.17% 1.60%
1930 0.24% 14.33%
1931 11.09% 10.96%
1932 2.55% 7.76%
1933 9.15% 6.79%
1934 0.74% 21.12%
1935 13.29% 5.98%
1936 3.25% 13.48%
1937 15.09% 10.01%
1938 9.76% 3.26%
1939 2.93% 11.11%
1940 12.96% 0.10%
1941 34.90% 6.29%
1942 23.02% 15.01%
1943 3.46% 7.60%
1944 23.07% 2.01%
1945 14.79% 1.29%
1946 0.73% 24.79%
1947 14.76% 4.88%
1948 9.20% 6.68%
1949 5.06% 22.98%
1950 1.47% 11.13%
1951 7.20% 3.90%
1952 11.32% 13.70%
1953 6.28% 0.16%
1954 6.67% 13.00%
1955 6.79% 9.39%
1956 2.28% 10.91%
1957 24.57% 1.33%
1958 14.52% 0.23%
1959 1.60% 11.73%
1960 2.62% 11.28%
1961 6.27% 12.44%
1962 0.40% 18.37%
1963 14.42% 13.92%
1964 18.81% 3.01%
1965 16.25% 8.60%
1966 7.54% 14.31%
1967 15.81% 9.81%
1968 7.49% 5.37%
1969 6.85% 3.87%
1970 12.35% 3.28%
1971 5.55% 15.31%
1972 5.35% 12.49%
1973 21.95% 3.94%
1974 3.07% 1.00%
1975 9.04% 3.62%
1976 11.97% 15.96%
1977 9.22% 27.51%
1978 17.50% 7.07%
1979 10.98% 6.67%
1980 4.13% 8.16%
1981 9.25% 13.77%
1982 7.84% 8.27%
1983 19.09% 7.86%
1984 13.60% 8.38%
1985 9.76% 20.96%
1986 13.19% 14.30%
1987 5.67% 39.35%
1988 13.02% 8.77%
1989 5.27% 27.74%
1990 6.71% 1.46%
1991 18.92% 12.81%
1992 3.90% 14.86%
1993 13.68% 8.36%
1994 11.64% 1.86%
1995 10.23% 4.80%
1996 10.96% 11.26%
1997 16.46% 8.91%
1998 7.86% 9.97%
1999 29.83% 7.08%
2000 6.58% 6.28%
2001 8.10% 16.66%
2002 4.02% 10.51%
2003 14.64% 7.57%
2004 18.49% 7.47%
2005 12.26% 7.79%
2006 12.06% 3.76%
2007 7.33% 1.22%
2008 11.50% 20.72%
2009 11.49% 2.41%
2010 13.66% 8.10%
2011 24.34% 10.03%
2012 4.13% 10.15%
2013 12.00% 7.64%