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| January |
|---|
| Very Warm: |
| Very Cold: |
| 1895 | 1896 | 1897 | 1898 | 1899 | 1900 | 1901 | 1902 | 1903 | 1904 | 1905 | 1906 | 1907 | 1908 | 1909 | 1910 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | 1917 | 1918 | 1919 | 1920 | 1921 | 1922 | 1923 | 1924 | 1925 | 1926 | 1927 | 1928 | 1929 | 1930 | 1931 | 1932 | 1933 | 1934 | 1935 | 1936 | 1937 | 1938 | 1939 | 1940 | 1941 | 1942 | 1943 | 1944 | 1945 | 1946 | 1947 | 1948 | 1949 | 1950 | 1951 | 1952 | 1953 | 1954 | 1955 | 1956 | 1957 | 1958 | 1959 | 1960 | 1961 | 1962 | 1963 | 1964 | 1965 | 1966 | 1967 | 1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.00% | 8.45% | 0.27% | 3.27% | 0.00% | 22.91% | 7.20% | 0.00% | 0.00% | 0.00% | 1.92% | 9.34% | 27.23% | 0.77% | 13.45% | 0.59% | 23.37% | 0.35% | 18.35% | 26.51% | 0.00% | 17.09% | 1.01% | 0.59% | 14.53% | 3.67% | 24.66% | 0.00% | 31.33% | 0.00% | 0.36% | 0.00% | 9.48% | 0.00% | 0.00% | 0.00% | 18.06% | 29.62% | 46.31% | 23.87% | 11.20% | 0.00% | 22.41% | 0.19% | 12.81% | 1.10% | 0.00% | 3.47% | 0.00% | 12.90% | 0.19% | 0.00% | 5.07% | 1.99% | 20.72% | 34.10% | 0.00% | 26.86% | 50.69% | 4.61% | 0.00% | 12.52% | 3.34% | 9.50% | 1.61% | 0.00% | 1.74% | 0.00% | 0.00% | 1.30% | 3.62% | 0.00% | 3.81% | 0.00% | 9.40% | 1.45% | 1.44% | 1.81% | 0.00% | 13.36% | 0.98% | 0.00% | 0.00% | 6.03% | 0.00% | 3.37% | 28.06% | 0.00% | 11.74% | 1.51% | 0.00% | 39.85% | 7.60% | 0.00% | 19.05% | 43.91% | 0.84% | 18.18% | 4.02% | 11.65% | 6.62% | 2.72% | 0.44% | 27.02% | 18.45% | 19.88% | 3.59% | 18.47% | 35.31% | 0.16% | 12.75% | 68.55% | 1.70% | 0.45% | 5.51% | 8.05% | 0.00% | 28.83% | 1.49% |
| 7.42% | 0.00% | 1.43% | 9.80% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 10.50% | 15.53% | 0.00% | 9.35% | 0.00% | 0.96% | 3.55% | 0.00% | 38.71% | 8.38% | 0.00% | 1.25% | 26.44% | 17.91% | 54.50% | 8.91% | 9.11% | 0.00% | 15.36% | 0.05% | 4.12% | 6.90% | 4.32% | 0.00% | 0.00% | 26.32% | 48.32% | 0.00% | 13.82% | 8.23% | 0.00% | 0.34% | 10.76% | 54.66% | 0.00% | 0.00% | 51.44% | 0.00% | 0.46% | 2.43% | 1.08% | 4.77% | 0.48% | 3.27% | 16.00% | 47.35% | 20.89% | 0.00% | 1.18% | 0.00% | 1.12% | 5.75% | 0.45% | 15.84% | 1.54% | 0.24% | 4.29% | 2.93% | 6.07% | 38.57% | 3.48% | 0.00% | 15.86% | 0.00% | 2.04% | 8.53% | 20.38% | 2.74% | 1.44% | 5.69% | 1.46% | 0.25% | 0.70% | 51.80% | 45.75% | 66.55% | 0.31% | 9.14% | 28.55% | 0.00% | 5.52% | 24.03% | 0.00% | 0.00% | 3.54% | 1.78% | 0.00% | 0.00% | 0.25% | 2.48% | 16.56% | 0.00% | 0.44% | 0.00% | 0.00% | 0.00% | 0.00% | 1.16% | 0.00% | 2.30% | 4.19% | 0.00% | 0.00% | 4.73% | 0.44% | 6.16% | 1.10% | 0.00% | 0.00% | 7.15% |
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 in the top ten percent (> 90th percentile) of their historical distribution are very warm and those in the bottom ten percent (< 10th percentile) are very cold.
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http://www.ncdc.noaa.gov/temp-and-precip/uspa/index.php