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

The percentage areas of the contiguous United States are computed based on the climate division data set. 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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January Very Wet: Very Dry:
1895 21.12% 0.00%
1896 5.91% 6.20%
1897 21.62% 2.69%
1898 19.81% 14.65%
1899 4.40% 2.01%
1900 2.40% 13.91%
1901 0.59% 7.01%
1902 0.00% 13.42%
1903 5.92% 5.50%
1904 1.01% 13.20%
1905 10.09% 1.70%
1906 16.22% 0.00%
1907 43.36% 13.67%
1908 0.00% 0.97%
1909 26.55% 18.06%
1910 9.37% 1.01%
1911 22.40% 11.63%
1912 4.34% 18.35%
1913 14.38% 1.23%
1914 21.45% 16.88%
1915 17.27% 2.73%
1916 55.87% 6.16%
1917 6.68% 6.35%
1918 14.46% 5.32%
1919 2.60% 25.02%
1920 9.88% 9.45%
1921 2.43% 3.37%
1922 2.32% 2.16%
1923 2.49% 3.21%
1924 0.16% 7.93%
1925 5.94% 13.05%
1926 8.59% 1.20%
1927 0.29% 17.24%
1928 0.00% 29.89%
1929 9.17% 1.45%
1930 12.07% 2.36%
1931 4.35% 26.26%
1932 23.25% 0.33%
1933 7.86% 7.10%
1934 3.11% 10.26%
1935 5.54% 7.50%
1936 18.01% 5.04%
1937 30.58% 1.36%
1938 6.44% 3.33%
1939 12.42% 0.16%
1940 9.47% 8.47%
1941 7.82% 6.20%
1942 0.27% 14.01%
1943 13.40% 11.67%
1944 13.86% 11.85%
1945 0.92% 6.32%
1946 12.47% 7.12%
1947 9.59% 7.63%
1948 3.45% 13.68%
1949 48.14% 11.68%
1950 28.13% 6.60%
1951 3.49% 8.77%
1952 13.11% 3.89%
1953 8.27% 7.18%
1954 7.62% 9.10%
1955 0.82% 9.07%
1956 9.32% 8.25%
1957 8.31% 7.13%
1958 9.90% 5.32%
1959 3.26% 10.81%