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 Warm: Very Cold:
1895 17.81% 1.90%
1896 35.28% 9.83%
1897 8.75% 5.95%
1898 12.18% 20.55%
1899 1.98% 3.08%
1900 12.10% 5.76%
1901 1.60% 28.67%
1902 11.44% 2.07%
1903 0.00% 4.32%
1904 1.85% 33.63%
1905 0.49% 0.77%
1906 7.55% 0.00%
1907 1.15% 58.36%
1908 13.40% 1.15%
1909 0.00% 25.35%
1910 30.21% 0.00%
1911 1.68% 6.27%
1912 1.54% 17.38%
1913 1.70% 0.00%
1914 0.00% 2.04%
1915 46.81% 1.20%
1916 0.00% 4.68%
1917 1.13% 23.49%
1918 0.00% 22.04%
1919 0.00% 0.00%
1920 0.00% 55.35%
1921 13.65% 3.36%
1922 7.89% 17.79%
1923 0.00% 0.81%
1924 0.00% 2.38%
1925 50.57% 0.08%
1926 16.91% 35.92%
1927 14.55% 1.15%
1928 0.00% 43.02%
1929 15.02% 10.25%
1930 39.72% 0.16%
1931 2.31% 13.41%
1932 0.09% 1.02%
1933 0.00% 11.34%
1934 27.92% 0.23%
1935 0.00% 9.30%
1936 2.96% 18.63%
1937 0.00% 1.07%
1938 0.15% 0.00%
1939 5.32% 4.25%
1940 0.62% 10.51%
1941 21.50% 10.02%
1942 17.31% 0.00%
1943 29.77% 10.90%
1944 0.45% 18.67%
1945 12.99% 20.02%
1946 45.03% 0.17%
1947 6.92% 2.35%
1948 43.29% 4.60%
1949 11.69% 4.65%
1950 3.19% 37.71%
1951 1.31% 12.29%
1952 9.32% 6.80%
1953 0.86% 21.97%
1954 53.57% 2.32%
1955 47.63% 13.52%
1956 0.00% 11.45%
1957 6.19% 4.19%
1958 0.00% 2.75%
1959 5.35% 2.71%
1960 6.55% 0.00%
1961 0.00% 33.20%
1962 6.39% 4.98%
1963 17.74% 11.47%
1964 3.21% 1.76%
1965 12.63% 1.36%
1966 2.34% 11.34%
1967 27.85% 23.92%
1968 4.87% 5.82%
1969 5.88% 0.59%
1970 3.61% 34.07%
1971 0.00% 1.27%
1972 9.40% 10.05%
1973 0.00% 31.47%
1974 0.11% 0.00%
1975 0.00% 59.38%
1976 3.74% 0.00%
1977 32.02% 0.00%
1978 5.73% 0.37%
1979 0.00% 3.81%
1980 10.71% 4.09%
1981 53.82% 0.00%
1982 0.45% 26.53%
1983 0.00% 61.03%
1984 0.23% 12.26%
1985 26.03% 0.00%
1986 18.29% 1.01%
1987 42.50% 13.13%
1988 3.48% 0.00%
1989 26.90% 0.16%
1990 18.80% 0.00%
1991 14.54% 0.00%
1992 27.90% 2.45%
1993 0.46% 20.02%
1994 9.37% 0.00%
1995 0.00% 11.96%
1996 2.11% 10.57%
1997 0.00% 49.24%
1998 5.43% 5.31%
1999 13.62% 3.76%
2000 22.55% 3.40%
2001 22.09% 0.00%
2002 33.28% 0.00%
2003 1.93% 2.93%
2004 4.60% 1.00%
2005 9.42% 4.06%
2006 65.12% 0.00%
2007 0.46% 13.90%
2008 5.55% 9.67%
2009 0.44% 0.21%
2010 29.39% 0.22%
2011 21.99% 7.06%
2012 43.16% 0.00%
2013 4.37% 24.41%