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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September Very Wet: Very Dry:
1895 5.77% 24.42%
1896 10.14% 1.40%
1897 5.72% 30.19%
1898 5.90% 10.48%
1899 0.00% 29.44%
1900 16.69% 3.91%
1901 11.14% 7.11%
1902 5.69% 6.01%
1903 4.49% 15.47%
1904 12.38% 12.09%
1905 6.11% 0.91%
1906 14.46% 2.92%
1907 8.37% 5.96%
1908 4.30% 19.38%
1909 6.09% 7.65%
1910 4.92% 7.04%
1911 13.92% 4.84%
1912 7.79% 8.48%
1913 9.59% 0.50%
1914 3.95% 8.22%
1915 10.43% 5.25%
1916 1.30% 2.98%
1917 3.57% 5.96%
1918 13.47% 6.83%
1919 11.71% 10.67%
1920 4.35% 2.27%
1921 9.24% 7.37%
1922 0.46% 29.12%
1923 16.26% 2.80%
1924 13.81% 3.88%
1925 14.47% 3.60%
1926 21.55% 6.69%
1927 14.54% 8.85%
1928 6.97% 26.36%
1929 11.14% 7.75%
1930 2.26% 4.66%
1931 4.22% 18.61%
1932 6.65% 20.32%
1933 4.47% 4.99%
1934 11.16% 3.99%
1935 6.27% 13.68%
1936 12.49% 1.17%
1937 0.00% 6.29%
1938 12.60% 9.86%
1939 8.88% 26.13%
1940 19.16% 17.78%
1941 26.97% 9.52%
1942 4.18% 10.27%
1943 1.99% 22.48%
1944 4.64% 9.79%
1945 18.74% 3.73%
1946 9.86% 2.03%
1947 3.11% 9.49%
1948 1.49% 19.77%
1949 0.00% 1.72%
1950 10.75% 3.47%
1951 6.23% 10.31%
1952 1.01% 21.51%
1953 3.17% 47.62%
1954 6.02% 15.19%
1955 2.13% 14.20%
1956 1.69% 45.80%
1957 14.20% 13.00%
1958 12.08% 6.67%
1959 17.46% 7.09%
1960 3.96% 12.69%
1961 22.25% 6.64%
1962 6.39% 0.93%
1963 6.86% 7.29%
1964 4.81% 9.72%
1965 25.25% 3.04%
1966 3.93% 3.02%
1967 9.70% 3.40%
1968 5.69% 16.06%
1969 2.07% 6.05%
1970 13.02% 6.14%
1971 9.82% 1.06%
1972 6.71% 4.93%
1973 26.99% 8.14%
1974 13.35% 22.48%
1975 13.47% 11.92%
1976 11.18% 8.09%
1977 19.63% 3.38%
1978 16.65% 11.58%
1979 16.45% 28.90%
1980 14.45% 3.97%
1981 3.07% 3.55%
1982 16.60% 4.08%
1983 6.92% 6.57%
1984 3.15% 13.93%
1985 17.38% 8.45%
1986 33.61% 2.77%
1987 4.53% 14.87%
1988 6.46% 2.78%
1989 12.19% 6.60%
1990 3.26% 16.46%
1991 8.15% 8.12%
1992 2.10% 5.81%
1993 8.32% 13.83%
1994 0.77% 2.48%
1995 1.06% 7.28%
1996 18.79% 0.46%
1997 12.89% 2.45%
1998 14.22% 13.24%
1999 10.15% 16.52%
2000 3.96% 14.65%
2001 3.31% 2.19%
2002 12.60% 3.92%
2003 11.08% 0.63%
2004 21.59% 13.94%
2005 3.55% 12.86%
2006 8.58% 3.53%
2007 0.90% 2.30%
2008 10.82% 12.76%
2009 10.71% 10.81%
2010 14.50% 14.38%
2011 12.57% 11.40%
2012 5.63% 24.13%
2013 28.88% 1.41%
2014 11.93% 3.93%
2015 1.43% 6.69%
2016 10.30% 5.85%
2017 8.60% 10.80%