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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April Very Wet: Very Dry:
1895 3.13% 13.71%
1896 18.41% 14.23%
1897 3.87% 5.87%
1898 0.00% 5.10%
1899 1.07% 21.96%
1900 37.12% 11.17%
1901 8.89% 5.32%
1902 0.00% 8.60%
1903 0.00% 10.46%
1904 2.45% 10.58%
1905 26.89% 7.33%
1906 8.50% 13.70%
1907 2.47% 5.86%
1908 12.86% 7.10%
1909 5.33% 23.31%
1910 0.63% 8.66%
1911 9.77% 4.11%
1912 10.31% 0.00%
1913 0.73% 2.52%
1914 8.46% 1.52%
1915 26.31% 25.54%
1916 3.67% 5.70%
1917 6.74% 2.32%
1918 6.40% 7.81%
1919 6.19% 0.25%
1920 17.99% 4.51%
1921 7.96% 2.34%
1922 17.15% 2.01%
1923 8.19% 1.19%
1924 4.39% 15.73%
1925 2.62% 13.07%
1926 17.14% 19.94%
1927 20.33% 9.06%
1928 11.46% 7.34%
1929 9.17% 1.60%
1930 0.24% 14.33%
1931 11.09% 10.96%
1932 2.55% 7.76%
1933 9.15% 6.79%
1934 0.74% 21.12%
1935 13.29% 5.98%
1936 3.25% 13.48%
1937 15.09% 10.01%
1938 9.76% 3.26%
1939 2.93% 11.11%
1940 12.96% 0.10%
1941 34.90% 6.29%
1942 23.02% 15.01%
1943 3.46% 7.60%
1944 23.07% 2.01%
1945 14.79% 1.29%
1946 0.73% 24.79%
1947 14.76% 4.88%
1948 9.20% 6.68%