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

NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.

The percentage areas of the contiguous United States are computed based on the U.S. Climate Divisional Dataset. Those climate divisions having the monthly average temperature/total precipitation in the top ten percent (> 90th percentile) of their historical distribution are very warm/wet and those in the bottom ten percent (< 10th percentile) are very cold/dry.

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July Very Warm: Very Cold:
1895 0.00% 50.54%
1896 9.55% 6.99%
1897 7.27% 21.32%
1899 0.69% 7.09%
1901 50.96% 4.17%
1903 0.71% 38.83%
1905 0.40% 44.65%
1907 0.78% 22.61%
1909 4.71% 26.48%
1911 3.72% 29.26%
1913 4.35% 33.37%
1915 0.99% 51.61%
1917 12.51% 0.84%
1919 6.11% 7.84%
1921 20.49% 6.77%
1923 2.18% 8.41%
1925 13.86% 7.84%
1927 0.48% 15.66%
1929 1.20% 2.19%
1931 39.15% 0.73%
1933 21.55% 0.50%
1935 24.91% 3.00%
1937 1.76% 0.45%
1939 6.48% 0.38%
1941 4.52% 9.85%
1943 1.64% 0.09%
1945 0.00% 10.49%
1947 3.03% 27.37%
1949 13.17% 0.52%
1951 10.79% 4.37%
1953 5.17% 0.00%
1955 25.64% 19.54%
1957 6.03% 0.81%
1959 12.73% 9.44%
1961 2.71% 15.17%
1963 7.97% 16.06%
1965 0.00% 17.92%
1967 0.54% 35.77%
1969 14.56% 1.31%
1971 2.51% 29.87%
1973 0.76% 4.94%
1975 7.99% 15.17%
1977 4.23% 0.00%
1979 1.10% 6.12%
1981 5.56% 0.88%
1983 11.27% 18.44%
1985 12.27% 0.36%
1987 7.06% 24.04%
1989 16.08% 6.85%
1991 3.08% 5.10%
1993 17.11% 38.59%
1995 5.94% 8.57%
1997 0.95% 4.19%
1999 18.76% 4.47%
2001 16.90% 7.48%
2003 39.18% 0.00%
2005 34.02% 0.00%
2007 32.28% 13.38%
2009 19.46% 37.59%
2011 56.70% 2.55%
2013 26.84% 6.48%