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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December Very Warm: Very Cold:
1895 0.31% 8.79%
1896 30.47% 0.00%
1897 0.00% 7.49%
1898 0.00% 35.33%
1899 1.93% 2.11%
1900 14.83% 0.00%
1901 0.00% 3.92%
1902 0.00% 5.11%
1903 1.36% 25.82%
1904 0.00% 6.24%
1905 0.61% 23.86%
1906 19.28% 0.59%
1907 1.22% 0.00%
1908 2.95% 4.80%
1909 0.00% 76.03%
1910 0.00% 13.81%
1911 4.92% 21.89%
1912 1.32% 12.21%
1913 12.09% 9.86%
1914 0.00% 62.76%
1915 0.00% 0.84%
1916 0.00% 42.31%
1917 23.68% 51.29%
1918 18.45% 9.73%
1919 0.95% 37.52%
1920 1.34% 0.41%
1921 20.86% 0.10%
1922 17.47% 3.42%
1923 41.37% 0.00%
1924 0.00% 53.52%