U.S. Percentage Areas (Very Warm/Cold, Very Wet/Dry)

Contiguous United States percentage area products are derived from standardized temperature and precipitation values, which are based on the U.S. Climate Divisional Dataset. Climate divisions with a standardized anomaly in the top ten percent (> 90th percentile) of their historical distribution are considered "very warm/wet" and those in the bottom ten percent (< 10th percentile) are classified as "very cold/dry". For more information please contact NCEI.Monitoring.info@noaa.gov.

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December Very Wet: Very Dry:
1895 9.29% 4.75%
1896 0.00% 33.23%
1897 3.93% 2.14%
1898 5.52% 13.06%
1899 4.53% 3.47%
1900 1.90% 22.79%
1901 15.23% 9.11%
1902 14.14% 0.00%
1903 1.88% 27.38%
1904 2.48% 4.34%
1905 8.51% 24.03%
1906 21.88% 2.01%
1907 9.60% 7.19%
1908 7.01% 20.38%
1909 18.74% 0.26%
1910 0.00% 6.45%
1911 23.17% 0.00%
1912 4.08% 14.74%
1913 18.25% 19.14%
1914 10.21% 11.59%
1915 5.99% 1.04%
1916 7.64% 6.22%
1917 10.88% 47.60%
1918 21.49% 5.70%
1919 1.89% 15.66%
1920 5.57% 5.36%
1921 14.33% 8.93%
1922 5.81% 18.11%
1923 17.54% 1.10%
1924 12.19% 0.39%
1925 5.33% 12.83%
1926 17.86% 1.05%
1927 14.10% 1.10%
1928 0.00% 13.77%
1929 7.16% 22.17%
1930 0.65% 45.09%
1931 23.79% 2.88%
1932 15.01% 4.53%
1933 13.83% 7.49%
1934 0.00% 4.08%
1935 1.84% 10.63%
1936 9.76% 0.00%
1937 7.40% 3.24%
1938 2.11% 8.34%
1939 0.50% 8.10%
1940 18.87% 4.45%
1941 10.78% 2.27%
1942 13.14% 0.62%
1943 9.08% 25.73%
1944 7.33% 13.85%
1945 9.47% 4.25%
1946 1.16% 9.60%
1947 5.43% 5.80%
1948 5.80% 3.25%
1949 5.32% 3.46%
1950 0.00% 30.51%
1951 20.66% 6.63%
1952 2.32% 5.90%
1953 8.62% 3.82%
1954 0.69% 19.19%
1955 17.32% 34.08%
1956 1.28% 13.71%
1957 6.16% 12.76%
1958 1.23% 41.86%
1959 7.92% 9.88%
1960 13.24% 13.00%
1961 6.83% 1.01%
1962 0.00% 14.61%
1963 0.45% 20.91%
1964 20.77% 0.86%
1965 17.25% 15.52%
1966 9.29% 4.15%
1967 19.77% 0.53%
1968 13.41% 0.84%
1969 11.99% 3.02%
1970 0.00% 10.60%
1971 17.45% 2.89%
1972 16.33% 1.17%
1973 19.71% 9.94%
1974 0.45% 1.91%
1975 2.05% 6.19%
1976 1.47% 45.99%
1977 18.00% 7.82%
1978 14.87% 2.36%
1979 1.65% 17.19%
1980 1.18% 26.67%
1981 6.45% 18.60%
1982 32.12% 1.18%
1983 24.62% 1.17%
1984 25.64% 5.67%
1985 1.07% 13.90%
1986 8.83% 26.58%
1987 15.32% 2.82%
1988 0.27% 11.48%
1989 4.10% 36.76%
1990 14.93% 5.05%
1991 21.73% 10.82%
1992 10.57% 1.57%
1993 1.18% 3.42%
1994 5.36% 4.97%
1995 4.09% 5.25%
1996 27.94% 11.88%
1997 14.21% 9.27%
1998 0.97% 9.91%
1999 2.38% 14.81%
2000 0.72% 11.67%
2001 1.86% 12.66%
2002 9.57% 9.97%
2003 4.38% 7.74%
2004 3.51% 7.85%
2005 7.95% 20.53%
2006 15.48% 2.23%
2007 23.38% 1.46%
2008 19.37% 6.43%
2009 22.81% 1.18%
2010 21.56% 12.49%
2011 12.02% 13.20%
2012 5.51% 2.24%
2013 11.94% 10.18%
2014 4.82% 1.45%
2015 37.38% 0.00%
2016 14.12% 0.00%