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
June Very Warm: Very Cold:
1895 5.47% 15.39%
1896 19.85% 0.24%
1897 7.75% 9.07%
1898 6.58% 0.00%
1899 6.06% 1.99%
1900 21.71% 0.00%
1901 8.00% 13.94%
1902 14.25% 23.25%
1903 3.25% 55.17%
1904 0.00% 12.98%
1905 2.00% 4.12%
1906 3.18% 15.24%
1907 0.00% 46.09%
1908 0.28% 20.05%
1909 0.00% 0.35%
1910 2.06% 19.87%
1911 38.50% 1.77%
1912 0.00% 31.00%
1913 0.00% 15.17%
1914 23.39% 3.51%
1915 4.17% 40.14%
1916 3.90% 36.09%
1917 0.00% 17.61%
1918 49.92% 4.85%
1919 19.16% 15.12%
1920 0.00% 5.13%
1921 27.18% 4.13%
1922 8.31% 0.00%
1923 5.58% 16.79%
1924 11.69% 16.04%
1925 26.08% 0.58%
1926 11.48% 20.25%
1927 1.45% 18.44%
1928 0.00% 45.39%
1929 0.00% 4.35%
1930 2.94% 2.91%
1931 26.21% 0.00%
1932 1.40% 0.61%
1933 43.20% 1.29%
1934 38.67% 3.98%
1935 0.00% 18.85%
1936 28.09% 0.84%
1937 1.42% 0.08%
1938 1.70% 1.10%
1939 6.68% 4.33%
1940 23.10% 7.04%
1941 0.10% 14.29%
1942 0.23% 5.73%
1943 23.96% 17.90%
1944 16.92% 17.55%
1945 0.83% 45.36%
1946 1.66% 1.38%
1947 0.10% 20.98%
1948 4.31% 1.67%
1949 9.70% 0.00%
1950 1.09% 0.00%
1951 0.00% 30.96%
1952 42.71% 7.28%
1953 33.09% 11.65%
1954 3.92% 10.95%
1955 0.00% 30.73%
1956 32.64% 0.61%
1957 4.96% 0.00%
1958 6.37% 22.19%
1959 13.00% 1.18%
1960 14.50% 0.00%
1961 31.46% 16.83%
1962 0.00% 0.00%
1963 1.68% 8.56%
1964 0.00% 0.19%
1965 0.00% 19.14%
1966 0.00% 11.32%
1967 4.07% 18.21%
1968 0.00% 1.89%
1969 3.53% 29.12%
1970 6.65% 2.26%
1971 7.55% 3.38%
1972 0.00% 17.62%
1973 3.27% 3.65%
1974 19.60% 25.63%
1975 0.00% 5.59%
1976 4.75% 19.42%
1977 23.66% 3.85%
1978 0.94% 0.00%
1979 0.00% 12.35%
1980 13.12% 14.03%
1981 24.56% 2.55%
1982 1.61% 39.00%
1983 0.21% 23.09%
1984 0.97% 0.65%
1985 10.01% 14.09%
1986 26.98% 2.04%
1987 14.37% 3.09%
1988 31.51% 1.36%
1989 0.51% 11.32%
1990 22.59% 0.00%
1991 9.37% 7.14%
1992 7.74% 29.47%
1993 0.36% 8.27%
1994 30.07% 0.00%
1995 6.85% 19.15%
1996 11.61% 0.00%
1997 2.86% 10.69%
1998 21.23% 18.82%
1999 4.35% 0.00%
2000 13.27% 1.27%
2001 13.03% 0.47%
2002 22.56% 0.59%
2003 8.94% 15.28%
2004 3.37% 6.41%
2005 13.61% 2.03%
2006 35.64% 0.00%
2007 12.61% 1.04%
2008 22.45% 0.00%
2009 9.23% 0.08%
2010 35.36% 0.00%
2011 30.76% 0.52%
2012 27.04% 2.07%
2013 26.45% 0.00%
2014 12.55% 0.00%
2015 39.49% 1.10%
2016 41.69% 0.00%
2017 21.50% 0.40%