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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 Warm: | Very Cold: |
|---|---|---|
| 1895 | 0.00% | 7.42% |
| 1896 | 8.45% | 0.00% |
| 1897 | 0.27% | 1.43% |
| 1898 | 3.27% | 9.80% |
| 1899 | 0.00% | 0.00% |
| 1900 | 22.91% | 0.00% |
| 1901 | 7.20% | 0.00% |
| 1902 | 0.00% | 0.00% |
| 1903 | 0.00% | 0.00% |
| 1904 | 0.00% | 10.50% |
| 1905 | 1.92% | 15.53% |
| 1906 | 9.34% | 0.00% |
| 1907 | 27.23% | 9.35% |
| 1908 | 0.77% | 0.00% |
| 1909 | 13.45% | 0.96% |
| 1910 | 0.59% | 3.55% |
| 1911 | 23.37% | 0.00% |
| 1912 | 0.35% | 38.71% |
| 1913 | 18.35% | 8.38% |
| 1914 | 26.51% | 0.00% |
| 1915 | 0.00% | 1.25% |
| 1916 | 17.09% | 26.44% |
| 1917 | 1.01% | 17.91% |
| 1918 | 0.59% | 54.50% |
| 1919 | 14.53% | 8.91% |
| 1920 | 3.67% | 9.11% |
| 1921 | 24.66% | 0.00% |
| 1922 | 0.00% | 15.36% |
| 1923 | 31.33% | 0.05% |
| 1924 | 0.00% | 4.12% |
| 1925 | 0.36% | 6.90% |
| 1926 | 0.00% | 4.32% |
| 1927 | 9.48% | 0.00% |
| 1928 | 0.00% | 0.00% |
| 1929 | 0.00% | 26.32% |
| 1930 | 0.00% | 48.32% |
| 1931 | 18.06% | 0.00% |
| 1932 | 29.62% | 13.82% |
| 1933 | 46.31% | 8.23% |
| 1934 | 23.87% | 0.00% |
| 1935 | 11.20% | 0.34% |
| 1936 | 0.00% | 10.76% |
