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

NCEI added Alaska climate divisions to its nClimDiv dataset on Friday, March 6, 2015, coincident with the release of the February 2015 monthly monitoring report. For more information on this data, please visit the Alaska Climate Divisions FAQ.

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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Download: xml csv json
November Very Warm: Very Cold:
1895 0.00% 20.99%
1896 11.18% 36.99%
1897 1.11% 8.97%
1898 0.00% 28.81%
1899 33.85% 0.17%
1900 1.44% 5.36%
1901 13.91% 21.81%
1902 31.40% 0.88%
1903 3.75% 17.66%
1904 20.73% 7.79%
1905 0.10% 1.40%
1906 0.00% 4.65%
1907 0.00% 5.39%
1908 0.72% 0.00%
1909 40.25% 0.00%
1910 9.71% 19.39%
1911 0.00% 51.56%
1912 0.58% 1.35%
1913 38.63% 0.00%
1914 16.53% 1.56%
1915 6.80% 0.00%
1916 0.00% 17.50%
1917 30.89% 14.66%
1918 0.00% 6.44%
1919 1.93% 22.33%
1920 0.00% 6.60%
1921 17.26% 9.19%
1922 5.95% 10.16%
1923 9.60% 1.44%
1924 4.20% 0.00%
1925 0.00% 1.40%
1926 9.99% 25.63%
1927 40.12% 3.70%
1928 0.00% 0.00%
1929 0.90% 39.52%
1930 0.00% 6.09%
1931 43.49% 19.96%
1932 7.06% 22.36%
1933 4.47% 9.27%
1934 18.67% 0.00%
1935 0.00% 21.28%
1936 0.00% 15.45%
1937 1.97% 6.59%
1938 0.00% 24.41%
1939 11.87% 7.43%
1940 0.00% 11.90%
1941 0.91% 0.00%
1942 9.57% 0.00%
1943 0.00% 1.85%
1944 2.44% 4.10%
1945 2.92% 0.54%
1946 15.63% 10.30%
1947 0.08% 44.08%
1948 13.23% 11.81%
1949 53.78% 1.79%
1950 14.13% 23.50%
1951 0.00% 42.28%
1952 0.00% 27.92%
1953 25.28% 0.00%
1954 36.37% 2.77%
1955 0.00% 28.56%
1956 0.00% 7.82%
1957 0.00% 23.60%
1958 1.61% 0.00%
1959 0.46% 38.28%
1960 0.10% 0.00%
1961 0.84% 9.96%
1962 18.24% 2.93%
1963 12.31% 0.00%
1964 2.80% 8.81%
1965 41.18% 0.59%
1966 18.50% 0.00%
1967 11.17% 13.90%
1968 0.00% 1.01%
1969 0.00% 0.77%
1970 0.00% 5.22%
1971 0.00% 0.86%
1972 0.00% 34.83%
1973 19.37% 2.11%
1974 0.00% 0.00%
1975 15.00% 0.00%
1976 5.59% 51.98%
1977 0.46% 0.00%
1978 12.04% 11.94%
1979 5.24% 19.21%
1980 3.79% 2.26%
1981 28.03% 0.00%
1982 1.45% 3.89%
1983 0.00% 0.00%
1984 0.00% 0.00%
1985 26.96% 39.82%
1986 8.29% 3.06%
1987 16.92% 0.00%
1988 2.59% 0.00%
1989 1.08% 0.23%
1990 28.55% 0.00%
1991 0.00% 17.56%
1992 0.45% 17.99%
1993 0.00% 22.89%
1994 36.39% 21.74%
1995 30.87% 23.55%
1996 0.00% 35.20%
1997 1.55% 1.73%
1998 35.84% 0.00%
1999 86.92% 0.00%
2000 0.00% 52.08%
2001 75.31% 0.00%
2002 2.73% 0.00%
2003 29.08% 4.05%
2004 24.46% 0.00%
2005 29.37% 0.00%
2006 17.15% 0.00%
2007 16.83% 0.00%
2008 33.80% 0.00%
2009 49.18% 0.00%
2010 0.00% 0.00%
2011 19.03% 0.00%
2012 34.39% 1.30%
2013 2.45% 0.00%
2014 4.98% 34.23%
2015 45.19% 0.22%
2016 84.86% 0.00%