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.

Move mouse towards an axis until highlighted. Left-click mouse to pan. Shift key + left-click to zoom.

June Very Wet: Very Dry:
1895 11.04% 15.16%
1896 1.27% 9.34%
1897 1.06% 4.47%
1898 3.38% 3.80%
1899 9.69% 4.00%
1900 11.57% 19.34%
1901 4.80% 16.21%
1902 8.62% 16.68%
1903 16.72% 10.25%
1904 10.87% 9.93%
1905 6.23% 9.50%
1906 7.78% 3.87%
1907 10.23% 3.46%
1908 9.06% 10.76%
1909 6.03% 4.02%
1910 8.09% 24.39%
1911 2.55% 17.22%
1912 5.10% 14.43%
1913 15.14% 8.00%
1914 20.06% 8.09%
1915 10.89% 7.58%
1916 8.34% 12.32%
1917 3.37% 25.99%
1918 6.44% 17.28%
1919 5.59% 24.04%
1920 4.32% 1.02%
1921 15.98% 8.38%
1922 4.94% 9.96%
1923 8.26% 2.51%
1924 4.68% 18.83%
1925 18.39% 4.58%
1926 0.00% 5.30%
1927 10.16% 1.65%
1928 28.34% 4.44%
1929 3.98% 10.01%
1930 1.20% 15.76%
1931 9.50% 18.46%
1932 8.48% 6.16%
1933 2.82% 45.84%
1934 6.88% 9.54%
1935 10.59% 23.22%
1936 4.98% 31.60%
1937 10.91% 2.95%
1938 11.11% 4.13%
1939 9.28% 8.84%
1940 11.88% 10.06%
1941 17.04% 2.47%
1942 11.82% 10.89%
1943 14.34% 1.82%
1944 16.74% 9.04%
1945 14.29% 9.42%
1946 6.18% 15.36%
1947 26.65% 3.25%
1948 14.19% 2.04%
1949 13.64% 10.09%
1950 6.57% 8.69%
1951 14.34% 13.50%
1952 7.05% 23.21%
1953 5.39% 15.55%
1954 6.79% 14.72%
1955 3.06% 5.26%
1956 0.76% 17.61%
1957 13.34% 2.72%
1958 11.13% 2.59%
1959 5.40% 11.92%
1960 5.39% 14.19%
1961 11.31% 15.37%
1962 9.82% 4.01%
1963 15.27% 7.94%
1964 17.07% 9.35%
1965 15.83% 5.78%
1966 3.82% 14.01%
1967 28.34% 5.00%
1968 14.76% 6.65%
1969 21.05% 5.21%
1970 7.00% 5.64%
1971 2.91% 11.83%
1972 17.47% 3.55%
1973 10.21% 12.21%
1974 5.24% 22.96%
1975 6.51% 6.05%
1976 4.76% 8.48%
1977 4.62% 6.43%
1978 1.57% 11.84%
1979 0.83% 16.47%
1980 1.27% 13.79%
1981 14.73% 7.75%
1982 10.78% 3.43%
1983 6.21% 6.42%
1984 15.13% 5.70%
1985 2.93% 7.12%
1986 12.29% 8.17%
1987 6.61% 9.40%
1988 3.84% 33.60%
1989 24.39% 9.21%
1990 5.03% 15.84%
1991 5.35% 8.49%
1992 14.22% 6.55%
1993 22.47% 2.93%
1994 8.30% 11.65%
1995 18.47% 7.80%
1996 6.22% 7.32%
1997 13.80% 1.56%
1998 25.52% 13.36%
1999 9.49% 4.83%
2000 20.11% 3.96%
2001 8.16% 13.08%
2002 5.14% 15.73%
2003 13.61% 11.68%
2004 18.11% 6.51%
2005 18.89% 8.47%
2006 8.53% 12.79%
2007 7.82% 8.02%
2008 10.43% 10.91%
2009 15.98% 4.93%
2010 19.32% 5.23%
2011 6.68% 15.06%
2012 6.60% 33.11%
2013 15.29% 16.09%