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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April Very Wet: Very Dry:
1895 3.64% 18.92%
1896 18.92% 14.81%
1897 6.02% 4.87%
1898 0.82% 7.51%
1899 1.16% 22.63%
1900 35.35% 9.54%
1901 11.33% 5.35%
1902 2.20% 14.41%
1903 3.85% 11.70%
1904 4.24% 10.00%
1905 21.26% 6.91%
1906 14.37% 16.08%
1907 2.88% 3.99%
1908 12.10% 6.42%
1909 5.67% 21.03%
1910 2.07% 11.53%
1911 12.07% 7.71%
1912 17.26% 0.32%
1913 3.75% 8.34%
1914 9.50% 1.46%
1915 24.83% 24.08%
1916 5.90% 6.92%
1917 11.81% 3.07%
1918 7.60% 8.87%
1919 9.37% 5.17%
1920 22.89% 5.47%
1921 7.22% 3.69%
1922 18.58% 1.38%
1923 12.21% 2.54%
1924 4.48% 16.52%
1925 6.41% 15.42%
1926 17.22% 20.11%
1927 19.03% 8.76%
1928 13.84% 7.48%
1929 12.36% 4.40%
1930 2.42% 17.92%
1931 11.71% 10.16%
1932 4.30% 6.84%
1933 7.15% 6.17%
1934 0.41% 21.76%
1935 15.07% 5.96%
1936 2.96% 14.94%
1937 14.41% 10.26%
1938 10.35% 3.55%
1939 2.98% 11.46%
1940 12.95% 0.10%
1941 34.52% 6.07%
1942 25.47% 15.02%
1943 3.95% 5.68%
1944 21.92% 2.43%
1945 12.27% 0.98%
1946 0.00% 25.07%
1947 14.27% 5.92%
1948 8.78% 6.48%
1949 5.13% 26.94%
1950 1.64% 12.58%
1951 7.44% 3.37%
1952 13.03% 14.12%
1953 7.01% 0.00%
1954 6.62% 15.07%
1955 6.67% 9.58%
1956 0.48% 10.96%
1957 25.56% 0.94%
1958 15.83% 0.89%
1959 1.77% 12.02%
1960 1.05% 11.43%
1961 6.51% 15.44%
1962 0.39% 20.31%
1963 15.27% 15.46%
1964 19.00% 3.21%
1965 17.47% 8.48%
1966 8.56% 16.29%
1967 14.09% 10.02%
1968 7.61% 6.45%
1969 6.07% 4.95%
1970 13.23% 3.05%
1971 4.77% 15.04%
1972 5.99% 13.26%
1973 21.47% 4.57%
1974 1.24% 1.01%
1975 8.96% 3.55%
1976 13.51% 16.22%
1977 11.12% 28.74%
1978 17.95% 7.08%
1979 11.44% 5.78%
1980 4.02% 9.05%
1981 8.51% 11.77%
1982 9.37% 7.89%
1983 17.86% 8.39%
1984 11.92% 8.38%
1985 8.47% 22.66%
1986 12.00% 15.80%
1987 4.64% 40.45%
1988 13.57% 9.02%
1989 5.27% 32.07%
1990 6.03% 1.46%
1991 18.60% 12.55%
1992 3.48% 12.85%
1993 13.23% 7.79%
1994 9.18% 1.62%
1995 9.39% 4.75%
1996 11.31% 10.65%
1997 16.87% 9.49%
1998 8.59% 9.62%
1999 31.13% 5.91%
2000 5.89% 7.01%
2001 8.08% 16.90%
2002 2.84% 9.50%
2003 11.80% 9.58%
2004 16.68% 7.07%
2005 8.30% 7.73%
2006 10.67% 4.18%
2007 6.08% 1.57%
2008 10.61% 19.45%
2009 11.48% 0.96%
2010 11.81% 9.33%
2011 25.65% 10.07%
2012 2.83% 7.78%
2013 12.08% 6.45%
2014 13.10% 5.57%
2015 10.83% 2.21%
2016 19.68% 0.86%
2017 26.06% 1.16%