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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February Very Warm: Very Cold:
1895 0.00% 61.51%
1896 0.58% 0.00%
1897 0.00% 1.56%
1898 1.94% 0.00%
1899 0.00% 67.85%
1900 0.00% 14.37%
1901 0.00% 22.66%
1902 0.00% 28.96%
1903 0.00% 47.27%
1904 8.55% 25.13%
1905 0.00% 56.47%
1906 3.28% 0.00%
1907 24.57% 5.48%
1908 0.00% 2.42%
1909 4.74% 0.00%
1910 0.00% 17.63%
1911 9.82% 18.04%
1912 0.00% 23.32%
1913 0.00% 22.70%
1914 0.00% 23.41%
1915 2.62% 0.00%
1916 3.33% 0.62%
1917 0.00% 21.60%
1918 2.54% 1.68%
1919 0.00% 7.89%
1920 0.00% 0.77%
1921 2.09% 0.00%
1922 5.73% 24.94%
1923 0.00% 24.66%
1924 10.84% 2.77%
1925 26.39% 0.00%
1926 16.60% 0.00%
1927 36.52% 0.00%
1928 0.00% 0.00%
1929 0.00% 67.42%
1930 53.46% 0.00%
1931 22.86% 0.00%
1932 41.66% 5.01%
1933 0.00% 35.44%
1934 20.72% 16.37%
1935 5.45% 0.00%
1936 0.00% 58.12%
1937 0.17% 6.10%
1938 24.78% 0.89%
1939 4.70% 41.51%
1940 0.00% 0.08%
1941 0.27% 5.01%
1942 0.00% 11.09%
1943 1.46% 0.00%
1944 6.31% 2.31%
1945 0.00% 0.00%
1946 3.13% 0.35%
1947 0.86% 27.32%
1948 0.00% 2.47%
1949 13.40% 27.44%
1950 6.67% 0.00%
1951 0.00% 0.00%
1952 2.64% 2.11%
1953 1.57% 0.00%
1954 71.73% 0.00%
1955 0.00% 19.19%
1956 3.36% 26.52%
1957 35.71% 0.00%
1958 13.35% 32.34%
1959 1.10% 1.88%
1960 1.94% 27.31%
1961 9.48% 0.00%
1962 19.75% 1.33%
1963 23.36% 23.85%
1964 0.00% 18.68%
1965 0.00% 1.17%
1966 0.00% 12.15%
1967 0.94% 4.57%
1968 15.56% 22.09%
1969 0.00% 2.70%
1970 6.61% 0.00%
1971 0.00% 0.00%
1972 0.00% 0.00%
1973 0.00% 1.94%
1974 0.00% 2.43%
1975 1.10% 1.05%
1976 58.39% 0.00%
1977 6.15% 0.00%
1978 0.00% 54.19%
1979 0.00% 40.79%
1980 1.90% 8.39%
1981 5.14% 0.00%
1982 1.10% 0.27%
1983 17.06% 0.00%
1984 28.11% 1.16%
1985 0.00% 6.51%
1986 8.76% 0.00%
1987 19.66% 0.00%
1988 2.46% 0.00%
1989 0.00% 42.33%
1990 29.74% 1.12%
1991 52.55% 0.00%
1992 50.79% 0.00%
1993 0.00% 10.24%
1994 0.84% 1.37%
1995 33.83% 0.00%
1996 11.82% 0.00%
1997 6.22% 0.00%
1998 33.05% 0.00%
1999 51.66% 0.00%
2000 52.22% 0.00%
2001 2.15% 0.00%
2002 17.84% 0.27%
2003 0.00% 0.00%
2004 0.00% 0.00%
2005 13.37% 0.00%
2006 1.55% 0.00%
2007 0.00% 8.55%
2008 4.05% 0.00%
2009 13.23% 0.00%
2010 3.56% 22.64%
2011 0.00% 0.00%
2012 17.44% 0.00%
2013 0.83% 0.00%
2014 10.37% 13.31%
2015 29.87% 31.11%
2016 52.01% 0.00%
2017 69.29% 0.00%