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
July Very Warm: Very Cold:
1895 0.00% 49.81%
1896 9.37% 6.65%
1897 6.45% 20.38%
1898 5.49% 1.39%
1899 0.52% 5.58%
1900 3.61% 5.53%
1901 49.30% 4.17%
1902 5.39% 39.18%
1903 0.48% 37.94%
1904 0.00% 50.51%
1905 0.40% 43.34%
1906 11.29% 33.06%
1907 0.69% 21.60%
1908 4.44% 14.34%
1909 4.33% 24.02%
1910 2.59% 1.33%
1911 3.44% 28.84%
1912 0.00% 32.27%
1913 3.96% 32.30%
1914 7.26% 14.06%
1915 0.55% 51.25%
1916 19.94% 13.84%
1917 9.78% 0.84%
1918 1.17% 23.38%
1919 5.95% 7.11%
1920 2.09% 15.47%
1921 19.93% 6.77%
1922 0.93% 13.56%
1923 1.60% 7.25%
1924 0.00% 37.46%
1925 13.86% 7.13%
1926 1.67% 10.25%
1927 0.48% 14.80%
1928 0.09% 4.81%
1929 0.00% 1.83%
1930 18.20% 0.73%
1931 38.72% 0.73%
1932 12.09% 7.97%
1933 19.11% 0.50%
1934 50.25% 0.45%
1935 23.96% 3.00%
1936 43.65% 3.27%
1937 1.02% 0.45%
1938 2.95% 9.87%
1939 4.47% 0.38%
1940 2.58% 3.03%
1941 4.43% 8.55%
1942 7.89% 1.11%
1943 1.19% 0.08%
1944 0.00% 13.75%
1945 0.00% 9.71%
1946 0.10% 1.59%
1947 2.56% 26.25%
1948 2.03% 9.71%
1949 12.77% 0.52%
1950 0.00% 59.29%
1951 10.79% 3.93%
1952 16.83% 2.36%
1953 4.31% 0.00%
1954 36.15% 4.40%
1955 24.66% 18.42%
1956 2.88% 13.76%
1957 5.81% 0.29%
1958 5.94% 26.95%
1959 12.48% 9.30%
1960 16.85% 9.19%
1961 1.13% 14.27%
1962 3.50% 39.17%
1963 7.97% 15.93%
1964 6.40% 2.80%
1965 0.00% 16.34%
1966 18.71% 3.25%
1967 0.54% 34.22%
1968 1.99% 11.08%
1969 14.36% 1.31%
1970 0.98% 1.27%
1971 2.24% 27.62%
1972 3.09% 30.20%
1973 0.59% 4.62%
1974 4.69% 3.10%
1975 7.99% 14.90%
1976 0.00% 22.15%
1977 4.10% 0.00%
1978 7.09% 2.05%
1979 1.10% 5.30%
1980 38.79% 0.00%
1981 5.56% 0.71%
1982 0.00% 6.63%
1983 9.68% 16.61%
1984 3.52% 12.47%
1985 12.23% 0.36%
1986 14.36% 30.17%
1987 6.70% 22.92%
1988 22.34% 0.00%
1989 14.29% 6.37%
1990 4.04% 10.18%
1991 3.06% 5.10%
1992 3.17% 45.26%
1993 15.90% 37.89%
1994 21.71% 15.03%
1995 5.35% 8.41%
1996 19.99% 14.90%
1997 0.95% 4.19%
1998 36.14% 0.00%
1999 18.38% 3.49%
2000 13.80% 11.41%
2001 16.43% 7.48%
2002 40.55% 1.17%
2003 38.92% 0.00%
2004 4.95% 13.69%
2005 32.78% 0.00%
2006 49.41% 0.00%
2007 32.28% 12.10%
2008 7.23% 1.45%
2009 17.69% 36.21%
2010 24.71% 0.00%
2011 55.12% 2.40%
2012 60.74% 0.00%
2013 26.78% 6.39%
2014 25.22% 29.40%
2015 13.08% 5.40%
2016 34.70% 0.00%
2017 38.48% 0.00%