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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October Very Warm: Very Cold:
1895 0.00% 54.63%
1896 0.00% 29.14%
1897 12.72% 6.72%
1898 0.00% 35.72%
1899 3.58% 24.40%
1900 36.23% 2.40%
1901 7.18% 0.00%
1902 0.79% 0.46%
1903 0.00% 1.74%
1904 0.13% 2.45%
1905 0.00% 37.20%
1906 0.00% 20.97%
1907 5.63% 11.66%
1908 0.00% 32.90%
1909 0.00% 12.33%
1910 2.98% 0.00%
1911 7.34% 22.67%
1912 0.08% 30.44%
1913 1.92% 40.86%
1914 7.01% 0.00%
1915 0.00% 0.00%
1916 0.00% 30.22%
1917 2.21% 56.73%
1918 9.35% 0.00%
1919 23.66% 47.81%
1920 18.46% 17.33%
1921 3.44% 0.00%
1922 0.47% 0.00%
1923 0.00% 40.95%
1924 11.86% 5.82%
1925 0.00% 54.14%
1926 5.60% 0.38%
1927 0.40% 0.00%
1928 6.35% 0.81%
1929 0.00% 0.90%
1930 0.00% 13.16%
1931 16.89% 0.00%
1932 0.00% 14.27%
1933 16.08% 2.25%
1934 20.70% 2.49%
1935 0.00% 1.11%
1936 1.89% 12.72%
1937 3.58% 1.32%
1938 23.26% 1.10%
1939 1.75% 0.33%
1940 23.77% 6.20%
1941 25.29% 9.21%
1942 0.00% 0.00%
1943 0.00% 1.54%
1944 11.87% 0.84%
1945 0.00% 0.17%
1946 4.90% 36.14%
1947 64.22% 0.00%
1948 0.00% 3.55%
1949 19.79% 19.01%
1950 34.35% 0.17%
1951 1.20% 2.20%
1952 22.89% 37.51%
1953 15.74% 0.45%
1954 4.71% 0.29%
1955 0.91% 0.00%
1956 27.45% 1.30%
1957 0.00% 29.46%
1958 5.36% 1.92%
1959 1.95% 21.00%
1960 0.00% 0.00%
1961 0.00% 0.00%
1962 3.28% 0.00%
1963 67.82% 0.00%
1964 10.59% 13.35%
1965 12.58% 1.54%
1966 0.00% 5.20%
1967 0.81% 1.61%
1968 1.10% 0.00%
1969 0.00% 48.18%
1970 0.59% 34.53%
1971 30.52% 21.50%
1972 0.00% 14.07%
1973 11.35% 0.00%
1974 0.00% 7.82%
1975 0.16% 1.25%
1976 0.00% 66.81%
1977 0.00% 2.96%
1978 8.56% 0.00%
1979 2.99% 0.00%
1980 0.00% 11.51%
1981 0.00% 9.77%
1982 0.00% 9.16%
1983 0.81% 0.00%
1984 18.89% 40.25%
1985 8.87% 2.22%
1986 0.29% 2.40%
1987 17.66% 36.87%
1988 30.14% 34.22%
1989 0.00% 0.00%
1990 4.42% 1.11%
1991 5.98% 3.92%
1992 5.78% 3.28%
1993 2.53% 4.75%
1994 0.00% 0.00%
1995 5.60% 1.62%
1996 0.00% 0.00%
1997 0.00% 0.00%
1998 2.97% 0.00%
1999 6.32% 0.00%
2000 0.00% 0.00%
2001 11.26% 1.36%
2002 6.46% 32.48%
2003 38.44% 0.00%
2004 12.17% 0.00%
2005 0.68% 0.00%
2006 0.00% 3.72%
2007 29.52% 0.71%
2008 0.81% 0.00%
2009 1.54% 50.86%
2010 7.35% 0.00%
2011 3.19% 0.00%
2012 4.37% 0.74%
2013 1.30% 5.49%
2014 40.60% 0.00%
2015 33.55% 0.00%
2016 49.62% 0.00%