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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January Very Warm: Very Cold:
1895 0.00% 7.42%
1896 8.45% 0.00%
1897 0.27% 1.43%
1898 3.27% 9.80%
1899 0.00% 0.00%
1900 22.91% 0.00%
1901 7.20% 0.00%
1902 0.00% 0.00%
1903 0.00% 0.00%
1904 0.00% 10.50%
1905 1.92% 15.53%
1906 9.34% 0.00%
1907 27.23% 9.35%
1908 0.77% 0.00%
1909 13.45% 0.96%
1910 0.59% 3.55%
1911 23.37% 0.00%
1912 0.35% 38.71%
1913 18.35% 8.38%
1914 26.51% 0.00%
1915 0.00% 1.25%
1916 17.09% 26.44%
1917 1.01% 17.91%
1918 0.59% 54.50%
1919 14.53% 8.91%
1920 3.67% 9.11%
1921 24.66% 0.00%
1922 0.00% 15.36%
1923 31.33% 0.05%
1924 0.00% 4.12%
1925 0.36% 6.90%
1926 0.00% 4.32%
1927 9.48% 0.00%
1928 0.00% 0.00%
1929 0.00% 26.32%
1930 0.00% 48.32%
1931 18.06% 0.00%
1932 29.62% 13.82%
1933 46.31% 8.23%
1934 23.87% 0.00%
1935 11.20% 0.34%
1936 0.00% 10.76%
1937 22.41% 54.66%
1938 0.19% 0.00%
1939 12.81% 0.00%
1940 1.10% 51.44%
1941 0.00% 0.00%
1942 3.47% 0.46%
1943 0.00% 2.43%
1944 12.90% 1.08%
1945 0.19% 4.77%
1946 0.00% 0.48%
1947 5.07% 3.27%
1948 1.99% 16.00%
1949 20.72% 47.35%
1950 34.10% 20.89%
1951 0.00% 0.00%
1952 26.86% 1.18%
1953 50.69% 0.00%
1954 4.61% 1.12%
1955 0.00% 5.75%
1956 12.52% 0.45%
1957 3.34% 15.84%
1958 9.50% 1.54%
1959 1.61% 0.24%
1960 0.00% 4.29%
1961 1.74% 2.93%
1962 0.00% 6.07%
1963 0.00% 38.57%
1964 1.30% 3.48%
1965 3.62% 0.00%
1966 0.00% 15.86%
1967 3.81% 0.00%
1968 0.00% 2.04%
1969 9.40% 8.53%
1970 1.45% 20.38%
1971 1.44% 2.74%
1972 1.81% 1.44%
1973 0.00% 5.69%
1974 13.36% 1.46%
1975 0.98% 0.25%
1976 0.00% 0.70%
1977 0.00% 51.80%
1978 6.03% 45.75%
1979 0.00% 66.55%
1980 3.37% 0.31%
1981 28.06% 9.14%
1982 0.00% 28.55%
1983 11.74% 0.00%
1984 1.51% 5.52%
1985 0.00% 24.03%
1986 39.85% 0.00%
1987 7.60% 0.00%
1988 0.00% 3.54%
1989 19.05% 1.78%
1990 43.91% 0.00%
1991 0.84% 0.00%
1992 18.18% 0.25%
1993 4.02% 2.48%
1994 11.65% 16.56%
1995 6.62% 0.00%
1996 2.72% 0.44%
1997 0.44% 0.00%
1998 27.02% 0.00%
1999 18.45% 0.00%
2000 19.88% 0.00%
2001 3.59% 1.16%
2002 18.47% 0.00%
2003 35.31% 2.30%
2004 0.16% 4.19%
2005 12.75% 0.00%
2006 68.55% 0.00%
2007 1.70% 4.73%
2008 0.45% 0.44%
2009 5.51% 6.16%
2010 8.05% 1.10%
2011 0.00% 0.00%
2012 28.83% 0.00%
2013 1.49% 7.15%