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

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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May Very Wet: Very Dry:
1895 7.89% 7.46%
1896 21.17% 18.95%
1897 3.18% 24.02%
1898 24.37% 9.18%
1899 5.36% 18.31%
1900 8.91% 14.57%
1901 11.28% 15.18%
1902 9.54% 3.32%
1903 12.12% 13.40%
1904 2.56% 5.84%
1905 16.52% 2.81%
1906 21.49% 3.92%
1907 14.66% 5.26%
1908 23.88% 0.00%
1909 4.37% 11.03%
1910 2.35% 17.13%
1911 5.01% 31.41%
1912 10.69% 5.28%
1913 3.41% 16.44%
1914 11.62% 16.74%
1915 28.24% 3.36%
1916 2.73% 9.69%
1917 14.75% 12.23%
1918 4.65% 11.74%
1919 7.27% 8.62%
1920 3.91% 14.96%
1921 9.51% 11.70%
1922 7.54% 2.01%
1923 11.84% 8.77%
1924 3.11% 28.97%
1925 2.40% 26.49%
1926 5.12% 12.41%
1927 16.22% 20.45%
1928 11.89% 21.23%
1929 17.86% 14.02%
1930 16.72% 8.18%
1931 1.51% 12.30%
1932 3.40% 13.60%
1933 12.34% 2.53%
1934 3.80% 41.96%
1935 24.13% 7.66%
1936 6.84% 27.14%
1937 3.22% 15.51%
1938 10.59% 4.76%
1939 0.42% 18.74%
1940 3.95% 21.90%
1941 16.71% 20.65%
1942 20.95% 16.25%
1943 9.23% 5.54%
1944 6.37% 2.81%
1945 11.70% 18.29%
1946 16.44% 2.46%
1947 11.78% 6.20%
1948 10.43% 14.44%
1949 8.58% 3.91%
1950 3.99% 12.49%
1951 4.27% 13.10%
1952 0.09% 8.88%
1953 16.39% 6.83%
1954 2.94% 7.33%
1955 5.86% 4.74%
1956 5.49% 5.04%
1957 43.26% 1.07%
1958 1.94% 10.39%
1959 9.87% 4.85%
1960 9.37% 9.50%
1961 7.20% 7.65%
1962 15.75% 22.54%
1963 2.30% 18.51%
1964 1.40% 13.60%
1965 13.89% 14.69%
1966 4.35% 22.89%
1967 5.32% 6.88%
1968 7.05% 1.64%
1969 5.89% 10.29%
1970 8.04% 17.20%
1971 10.72% 4.14%
1972 8.75% 5.94%
1973 8.64% 6.45%
1974 8.95% 22.03%
1975 8.31% 4.98%
1976 10.86% 10.22%
1977 17.18% 15.44%
1978 12.92% 2.18%
1979 14.64% 1.07%
1980 17.88% 11.68%
1981 20.10% 2.27%
1982 19.45% 7.17%
1983 13.97% 3.20%
1984 12.35% 11.65%
1985 2.06% 5.74%
1986 2.29% 4.08%
1987 18.41% 3.48%
1988 2.56% 23.63%
1989 10.98% 4.71%
1990 20.81% 3.40%
1991 19.11% 5.42%
1992 12.06% 25.64%
1993 6.64% 6.28%
1994 5.69% 10.68%
1995 34.15% 0.73%
1996 21.47% 14.46%
1997 1.77% 5.15%
1998 18.03% 25.40%
1999 6.98% 4.48%
2000 4.00% 20.62%
2001 8.08% 15.59%
2002 6.05% 23.55%
2003 14.64% 5.45%
2004 18.86% 17.73%
2005 16.31% 11.12%
2006 4.11% 14.45%
2007 16.45% 23.62%
2008 9.13% 4.93%
2009 15.17% 6.24%
2010 12.54% 4.07%
2011 26.39% 15.54%
2012 5.90% 20.53%
2013 13.34% 5.70%
2014 0.75% 4.35%
2015 44.82% 6.77%
2016 6.27% 1.62%
2017 11.53% 1.78%